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Grammar, Syntax & Standard English Conventions

13 questions

All types13Multiple choice8Multiple select2Matching1Fill in the blank2
Question 1Question →

Read the following sentence from a draft of an academic essay:

"Although historical analysis often frames the Industrial Revolution as a sudden rupture with previous economic models; nevertheless, recent quantitative studies demonstrate gradual shifts in capital accumulation, furthermore, these findings suggest that technological innovation alone cannot account for structural transformation."

Which of the following revisions best corrects the sentence boundary and syntactic errors while preserving formal academic tone?

Show answer & explanation

Answer: Although historical analysis often frames the Industrial Revolution as a sudden rupture with previous economic models, recent quantitative studies demonstrate gradual shifts in capital accumulation; furthermore, these findings suggest that technological innovation alone cannot account for structural transformation.

Answer

The correct revision removes the redundant 'nevertheless' following the subordinate clause introduced by 'Although' and uses a semicolon before the conjunctive adverb 'furthermore' to join two independent clauses without creating a comma splice.
The correct revision properly resolves both sentence structure issues. First, it removes 'nevertheless', eliminating the redundant dual transition caused by combining 'Although' with a semicolon and 'nevertheless'. Second, it places a semicolon before 'furthermore', correctly joining the second and third independent clauses according to Standard English conventions.

Step-by-Step Solution

1
Identify sentence boundary and subordination errors in the original sentence.
Found two main errors: 1) Double subordination/coordination by pairing 'Although' with '; nevertheless,', and 2) a comma splice joining two independent clauses using only a comma before 'furthermore'.
Subordinate clauses starting with 'Although' should not be paired with adversarial conjunctive adverbs like 'nevertheless'. Independent clauses joined by conjunctive adverbs like 'furthermore' require a semicolon or a period.
2
Evaluate choices for proper clause joining and elimination of redundancy.
The revision that changes the semicolon after 'models' to a comma (completing the dependent clause) and replaces the comma before 'furthermore' with a semicolon correctly joins the independent clauses.
A semicolon preceding a conjunctive adverb properly separates independent clauses, avoiding a comma splice.
3
Verify that all clauses maintain grammatical completeness (subject and finite verb).
The correct option preserves finite verbs in all three clauses without fragmenting any component.
Participial forms such as 'demonstrating' or 'suggesting' without auxiliary verbs turn independent clauses into non-finite fragments.

Key Concept

Sentence Boundary Rules and Conjunctive Adverb Punctuation
Estimated Time:2m 0s
Question 2Question →

Fill in each blank with the correct present-tense conjugated form of the indicated verb ('to suspect' for the first blank and 'to indicate' for the second blank) so that the sentence strictly adheres to standard English subject-verb agreement rules.

Fill in the blanks below

Neither the lead archaeologist nor her research assistants that the subtle variations in soil composition a significant shift in ancient agricultural practices.
Show answer & explanation

Answer

The first blank requires the plural verb 'suspect', and the second blank requires the plural verb 'indicate'.
For the first blank, the correlative conjunction 'neither... nor' dictates that the verb agrees with the closer subject, 'research assistants' (plural), making 'suspect' the correct conjugation. For the second blank, the head noun of the subject phrase is the plural 'variations', which requires the plural verb 'indicate' despite the singular noun 'composition' occurring closer to the verb.

Step-by-Step Solution

1
Analyze the subject structure for the first clause containing the correlative conjunction 'Neither... nor'.
The compound subject is joined by 'Neither... nor', linking the singular noun 'the lead archaeologist' and the plural noun 'her research assistants'.
When subjects are joined by 'neither... nor', the verb must agree with the subject closest to it, which is the plural noun 'research assistants'.
2
Conjugate the verb 'to suspect' for the first blank.
Since the closer subject subject ('research assistants') is plural, the correct present-tense verb form is 'suspect'.
Plural subjects require plural verb forms without an '-s' suffix in the present tense.
3
Identify the simple subject and strip intervening modifier phrases for the dependent clause containing the second blank.
The complete subject phrase is 'the subtle variations in soil composition'. The prepositional phrase 'in soil composition' modifies the head noun 'variations'.
Intervening prepositional phrases do not change the number of the simple subject. The simple subject is the plural noun 'variations'.
4
Conjugate the verb 'to indicate' for the second blank.
The plural simple subject 'variations' requires the plural verb form 'indicate'.
Choosing 'indicates' would be a proximity error caused by agreeing with the singular noun 'composition' inside the prepositional phrase.

Key Concept

Subject-Verb Agreement with Correlative Conjunctions and Intervening Prepositional Phrases
Question 3Question →

Match each punctuation mark or convention used in academic writing with its correct syntactic function.

Click a left item, then click its matching right item

Items

Em-dashes used around a parenthetical insertion
Semicolon preceding a conjunctive adverb (e.g., 'however', 'consequently')
Colon following an independent clause
Commas setting off a relative clause

Matches

Show answer & explanation

Answer

The correct pairings are: Em-dashes set off complex parenthetical insertions; a semicolon before a conjunctive adverb connects two independent clauses; a colon after a main clause introduces an amplifying clause or list; and commas isolate non-restrictive relative clauses.
Each punctuation convention aligns strictly with standard English rules: em-dashes isolate complex parenthetical insertions; semicolons with conjunctive adverbs join main clauses; colons introduce amplifying explanations after complete clauses; and commas enclose non-restrictive relative clauses.

Step-by-Step Solution

1
Analyze the syntactic role of em-dashes in parenthetical insertions.
Em-dashes emphasize structural interruptions or set off parenthetical lists that contain internal commas.
Prevents comma splices and ambiguity when a parenthetical phrase itself contains internal punctuation.
2
Analyze the rule for connecting independent clauses with a conjunctive adverb.
A semicolon must precede the conjunctive adverb and a comma must follow it.
Conjunctive adverbs cannot join two main clauses with only a comma without causing a comma splice.
3
Evaluate the requirement for colon usage.
The clause before the colon must be grammatically complete and introduce an explanation or amplification.
Colons signal a direct logical transition from a general statement to specific clarification or elaboration.
4
Distinguish restrictive from non-restrictive relative clauses with commas.
Non-restrictive relative clauses are enclosed in commas because they provide supplementary detail rather than essential identification.
Omitting commas from non-restrictive clauses incorrectly implies the modifier is restrictive.

Key Concept

Punctuation conventions governing clause connections, parenthetical insertions, and non-restrictive modifiers in formal academic prose.
Question 4Question →

Consider the following draft sentence from an essay on historical linguistics:

"Tracing the evolution of phonological shifts across isolated dialects presents significant methodological hurdles; nevertheless, recent computational algorithms have enabled researchers to reconstruct ancestral sound changes with unprecedented accuracy, however, these models still require validation against manual textual transcriptions."

Which of the following options provides a grammatically correct revision of the sentence?

Show answer & explanation

Answer: Although tracing the evolution of phonological shifts across isolated dialects presents significant methodological hurdles, recent computational algorithms have enabled researchers to reconstruct ancestral sound changes with unprecedented accuracy; however, these models still require validation against manual textual transcriptions.

Answer

The grammatically correct revision replaces the comma splice before 'however' with a semicolon and converts the initial clause into a subordinate clause starting with 'Although'.
The correct revision resolves the comma splice by using the subordinating conjunction 'Although' to turn the first idea into a dependent clause, and using a semicolon before the conjunctive adverb 'however' to connect the final independent clause. This ensures every clause boundary follows standard English punctuation rules.

Step-by-Step Solution

1
Identify the independent clauses and transitional adverbs in the original sentence.
The original sentence contains three independent clauses connected by conjunctive adverbs: 'nevertheless' (preceded correctly by a semicolon) and 'however' (preceded incorrectly by a comma).
Conjunctive adverbs such as 'however', 'nevertheless', and 'moreover' cannot join two independent clauses with a comma alone.
2
Evaluate the punctuation surrounding the conjunctive adverb 'however'.
Joining the clause ending in 'unprecedented accuracy' to 'these models still require...' using a comma and 'however' produces a comma splice.
When a conjunctive adverb links two independent clauses, it must be preceded by a semicolon or period, not a comma.
3
Select the option that fixes the boundary error while preserving proper clause relationships.
The revision beginning with 'Although' subordinating the first clause and placing a semicolon before 'however' establishes clear syntactic hierarchy and eliminates all comma splices.
Subordinating one clause with 'Although' removes the need for 'nevertheless', and using a semicolon before 'however' properly joins the remaining independent clauses.

Key Concept

Sentence Boundaries and Conjunctive Adverbs
Question 5Question →

Read the following sentence from an academic essay draft:

"A meticulous analysis of the historical documents, alongside recent archaeological discoveries from the excavation sites, reveal that the ancient trade routes were far more extensive than previously assumed."

Which of the following revisions correctly maintains standard subject-verb agreement?

Show answer & explanation

Answer: A meticulous analysis of the historical documents, alongside recent archaeological discoveries from the excavation sites, reveals that the ancient trade routes were far more extensive than previously assumed.

Answer

The revision that changes 'reveal' to 'reveals' while preserving 'were' correctly maintains subject-verb agreement across both the main clause and the dependent clause.
The simple subject of the main clause is 'analysis', which is singular. Expressions introduced by 'alongside', 'together with', or 'as well as' are prepositional modifiers and do not create a plural compound subject. Therefore, the singular verb 'reveals' is required. Additionally, the plural subject 'routes' in the dependent clause correctly matches the plural verb 'were'.

Step-by-Step Solution

1
Identify the primary grammatical subject of the main clause.
The core subject is the singular noun 'analysis'.
The words following 'analysis' ('of the historical documents' and 'alongside recent archaeological discoveries...') are prepositional/modifier phrases that do not change the number of the subject.
2
Determine the correct verb form for the main clause predicate.
The singular subject 'analysis' requires the singular verb 'reveals' rather than the plural 'reveal'.
Phrases introduced by prepositions or compound prepositions like 'alongside', 'as well as', or 'in addition to' do not form compound subjects.
3
Verify agreement in the subordinate clause.
The plural subject 'trade routes' correctly pairs with the plural past-tense verb 'were'.
The dependent clause subject 'routes' is plural and must maintain plural agreement.

Key Concept

Subject-Verb Agreement with Intervening Prepositional Phrases
Question 6Question →

The following sentence contains a series of coordinate elements after a modal verb. Which base verb correctly completes the blank to maintain parallel structure?

Fill in the blanks below

To build a compelling academic argument, a scholar must formulate a clear thesis, support claims with verifiable evidence, and potential counterarguments.
Show answer & explanation

Answer

The blank must be filled with a base verb (such as 'address', 'anticipate', 'rebut', 'refute', 'acknowledge', or 'counter') to parallel the base verbs 'formulate' and 'support' governed by the modal auxiliary verb 'must'.
The correct completion uses a base verb to parallel the preceding base verbs 'formulate' and 'support' that follow the modal verb 'must'.

Step-by-Step Solution

1
Identify the coordinate elements forming a list in the sentence.
The sentence lists three actions governed by the modal verb 'must': (1) 'formulate a clear thesis', (2) 'support claims with verifiable evidence', and (3) the blank phrase.
Parallel structure requires items in a coordinate series to share the same grammatical form.
2
Analyze the grammatical form of the existing items in the series.
Both 'formulate' and 'support' are bare infinitive (base form) verbs that follow the modal auxiliary 'must'.
Modal verbs take base forms without 'to'.
3
Determine the required grammatical category for the final item.
The final item must begin with a base verb (e.g., 'address') followed by the direct object 'potential counterarguments'.
Matching base verbs maintains Syntactic Parallelism across all coordinate elements.

Key Concept

Parallel Structure and Coordinate Elements
Question 7Question →

Read the following excerpt from an essay on environmental policy:

"Recent econometric models suggest that carbon pricing mechanisms effectively curb industrial emissions, however, their implementation frequently encounters socio-political resistance in developing economies reliant on fossil-fuel infrastructure."

Which of the following revisions best corrects the sentence boundary error in the excerpt while maintaining formal academic tone?

Show answer & explanation

Answer: Recent econometric models suggest that carbon pricing mechanisms effectively curb industrial emissions; however, their implementation frequently encounters socio-political resistance in developing economies reliant on fossil-fuel infrastructure.

Answer

The revision that replaces the comma before 'however' with a semicolon correctly fixes the sentence boundary error while preserving the contrasting logical relationship between clauses.
The correct revision resolves the comma splice by placing a semicolon before the conjunctive adverb 'however'. When two independent clauses are connected by a conjunctive adverb, a semicolon (or period) is required to separate the clauses grammatically.

Step-by-Step Solution

1
Analyze the structural boundary of the original sentence.
Identified two independent clauses ('Recent econometric models suggest...' and 'their implementation frequently encounters...') linked only by a comma and the conjunctive adverb 'however'.
Conjunctive adverbs cannot join two independent clauses with a comma alone; doing so produces a comma splice.
2
Evaluate punctuation strategies to fix comma splices containing conjunctive adverbs.
A semicolon preceding the conjunctive adverb (or separating the clauses into two sentences) correctly establishes clause boundaries.
Independent clauses joined by conjunctive adverbs require either a semicolon before the adverb or a full sentence stop.
3
Assess options for grammatical accuracy, logical coherence, and academic tone.
The revision using '; however,' maintains clause independence, correct punctuation mechanics, and accurate logical contrast.
This is the only choice that resolves the punctuation error without creating fragments or introducing new run-on structures.

Key Concept

Sentence Boundaries and Conjunction Mechanics with Conjunctive Adverbs
Estimated Time:1m 30s
Question 8Question →

Consider the following sentence from an academic essay proposal:

"To address the rising operational costs, the director recommended that the research team consolidate existing laboratory resources, streamline experimental protocols, and that automated data collection tools be adopted across all departments."

Which of the following revisions best corrects the sentence by establishing proper parallel structure across coordinate elements?

Show answer & explanation

Answer: the director recommended that the research team consolidate existing laboratory resources, streamline experimental protocols, and establish automated data collection tools across all departments.

Answer

The revision that lists three parallel base verbs ('consolidate', 'streamline', and 'establish') following the subordinator 'that the research team' correctly restores parallel structure.
The correct option preserves parallel structure by maintaining a consistent series of three parallel subjunctive base verbs ('consolidate', 'streamline', and 'establish') that all depend logically on the introductory phrase 'that the research team'.

Step-by-Step Solution

1
Identify the governing clause structure and coordinate elements in the original sentence.
The governing subordinator phrase is 'that the research team [verb]'. The list contains three actions.
Parallel structure requires items in a coordinate series to share the identical grammatical form.
2
Analyze the grammatical forms of each element in the original list.
Element 1 is a base verb ('consolidate'), Element 2 is a base verb ('streamline'), but Element 3 shifts into a subordinate clause ('that automated data collection tools be adopted').
Mixing verb phrases with a full subordinate clause violates syntactic parallelism.
3
Select the option that converts all coordinate elements to the same grammatical structure.
Matching three base verbs ('consolidate', 'streamline', and 'establish') completes the series parallelly.
All three items now seamlessly follow 'that the research team'.

Key Concept

Parallelism in coordinate series governed by a shared subordinator
Question 9Question →

In high-register academic writing, complex multi-clause sentences must adhere strictly to standard English sentence boundaries. Which of the following sentences are grammatically complete and correctly punctuated without any fragments, comma splices, or run-on errors? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Although the preliminary survey of ancient manuscript fragments suggested a late medieval origin, subsequent radiocarbon dating revealed that the parchment was manufactured in the eighth century; consequently, historians were forced to revise their timeline of regional literacy.; Whereas early cognitive psychologists viewed memory retrieval as a passive reconstruction of past events, contemporary neuroscientists argue that each act of recall actively alters the underlying neural network, thereby modifying the memory itself.

Answer

The selections beginning with 'Although the preliminary survey...' and 'Whereas early cognitive psychologists...' are both grammatically complete and correctly punctuated without sentence boundary errors.
The sentence starting with 'Although the preliminary survey...' correctly connects a dependent clause to an independent clause with a comma and attaches a second independent clause using a semicolon and conjunctive adverb '; consequently,'. The sentence starting with 'Whereas early cognitive psychologists...' cleanly joins a subordinate contrasting clause to an independent main clause followed by a participial modifier. Both maintain valid sentence boundaries.

Step-by-Step Solution

1
Analyze each option to identify whether all clauses form a complete syntactic unit.
Determine if any selection lacks a main independent clause or consists solely of a subordinate structure.
Sentence fragments fail to express a complete thought because they lack a primary independent clause.
2
Examine the boundary punctuation between independent clauses.
Identify improper joining mechanics such as commas without coordinating conjunctions or missing punctuation.
Connecting two independent clauses with only a comma creates a comma splice, while omitting punctuation entirely yields a fused run-on.
3
Verify punctuation rules for conjunctive adverbs.
Confirm that transitional adverbs like 'however' and 'consequently' are preceded by a semicolon when joining independent clauses.
Conjunctive adverbs cannot syntactically link independent clauses with a comma alone.

Key Concept

Sentence Boundaries: Fragments, Comma Splices, and Run-On Sentences
Question 10Question →

Read the following excerpt from a draft essay on public health policy:

"The implementation of strict municipal water fluoridation standards has significantly reduced dental caries across urban demographics, however, rural communities frequently lack the centralized infrastructure necessary to maintain consistent chemical monitoring, this discrepancy exacerbates existing regional health disparities."

Which of the following revisions best corrects the sentence boundary errors in the excerpt?

Show answer & explanation

Answer: The implementation of strict municipal water fluoridation standards has significantly reduced dental caries across urban demographics; however, rural communities frequently lack the centralized infrastructure necessary to maintain consistent chemical monitoring, a discrepancy that exacerbates existing regional health disparities.

Answer

The revision that places a semicolon before 'however' and converts the final clause into an appositive phrase ('a discrepancy that exacerbates...') correctly repairs all sentence boundary errors.
The correct option properly resolves both comma splices in the original sentence. It places a semicolon before the conjunctive adverb 'however' to connect the first two independent clauses, and rewrites the third independent clause as an appositive phrase ('a discrepancy that exacerbates...'), integrating all three thoughts seamlessly and grammatically.

Step-by-Step Solution

1
Identify the independent clauses and punctuation errors in the original excerpt.
The excerpt contains three independent clauses joined solely by commas: (1) 'The implementation... demographics', (2) 'rural communities... monitoring', and (3) 'this discrepancy... disparities'.
Joining independent clauses with commas without coordinating conjunctions creates comma splices.
2
Evaluate punctuation around the conjunctive adverb 'however'.
A conjunctive adverb connecting two independent clauses must be preceded by a semicolon or a period, not a comma.
Using a comma before 'however' when linking complete sentences is a grammatical error.
3
Select the revision that correctly separates or subordinate clauses to eliminate all comma splices without creating fragments.
Replacing the comma before 'however' with a semicolon and changing the final independent clause into a subordinate relative clause inside an appositive noun phrase creates a syntactically sound sentence.
This maintains clear logical relationships between clauses while adhering to Standard English sentence structure rules.

Key Concept

Sentence Boundaries: Resolving Comma Splices and Run-On Sentences
Question 11Question →

Which of the following sentences adheres most strictly to Standard English punctuation conventions?

Show answer & explanation

Answer: Historians of technology often emphasize that innovation is rarely a solitary endeavor; rather, it emerges from collaborative networks—systems of shared knowledge, capital, and institutional support—that evolve over decades.

Answer

The sentence that correctly uses a semicolon with 'rather,', paired em-dashes for the appositive series, and no comma before the restrictive relative clause is correct.
The correct option perfectly balances three distinct punctuation rules: (1) connecting two independent clauses with a semicolon and a comma-followed conjunctive adverb ('rather,'), (2) setting off an internal series of appositives containing commas with a pair of em-dashes ('—systems...support—'), and (3) maintaining the restrictive nature of the clause introduced by 'that' without unnecessary preceding punctuation.

Step-by-Step Solution

1
Analyze independent clause linkage
The two main independent clauses ('innovation is rarely a solitary endeavor' and 'it emerges from collaborative networks') are linked by the conjunctive adverb 'rather'. Standard English requires a semicolon before 'rather' and a comma after it.
Joining two independent clauses with only a comma creates a comma splice.
2
Evaluate parenthetical appositive punctuation
The phrase 'systems of shared knowledge, capital, and institutional support' elaborates on 'collaborative networks' and contains internal commas.
Using paired em-dashes clearly sets off an amplifying appositive list that already contains internal commas, preventing confusion with the surrounding sentence structure.
3
Check relative clause punctuation
The relative clause 'that evolve over decades' restricts the meaning of the preceding noun phrases.
Restrictive relative clauses introduced by 'that' should not be preceded by a comma or colon.

Key Concept

Advanced Punctuation Conventions: Semicolons with Conjunctive Adverbs, Paired Em-Dashes, and Restrictive Clauses
Estimated Time:1m 15s
Question 12Question →

In formal academic prose, maintaining clear syntactic boundaries is critical for rhetorical precision. Which of the following sentences are grammatically complete and free of sentence boundary errors, such as sentence fragments, comma splices, and run-on sentences? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Although early quantum theorists posited that light exhibited dual wave-particle properties, subsequent empirical observations confirmed this hypothesis; consequently, classical physics underwent a fundamental paradigm shift.; While economic indicators suggested a robust recovery following the fiscal reforms, inflation rates rose sharply during the fourth quarter; this unexpected divergence forced central bankers to reevaluate their monetary policies.

Answer

The correct selections are the sentence discussing quantum theorists and classical physics, and the sentence regarding economic indicators and monetary policies.
The sentence detailing quantum physics and classical paradigm shifts correctly uses a subordinate clause followed by two independent clauses properly joined with a semicolon and the conjunctive adverb 'consequently'. Similarly, the sentence addressing economic indicators and central bank policies correctly links its independent clauses using a semicolon, avoiding any boundary errors.

Step-by-Step Solution

1
Analyze each clause structure in the sentence regarding quantum physics.
Identified a subordinate clause ('Although... properties'), a main clause ('subsequent... hypothesis'), and a second main clause ('consequently... shift') correctly joined by a semicolon and comma.
Semicolons followed by conjunctive adverbs are valid structural links between independent clauses.
2
Evaluate the sentence on sociological studies and urbanization.
Found two independent clauses joined by a comma before the conjunctive adverb 'however'.
Conjunctive adverbs cannot join independent clauses with only a comma; doing so creates a comma splice.
3
Inspect the sentence on economic indicators and inflation rates.
Verified that the subordinate clause leads into a complete independent clause, which is correctly linked to another independent clause via a semicolon.
The sentence adheres to standard punctuation and clause boundaries.
4
Examine the sentence regarding historians and agrarian economy collapse.
Detected a subordinating conjunction ('Whereas') introducing a clause with no main clause following it.
A dependent clause left standing alone constitutes a sentence fragment.
5
Review the sentence concerning neuroscientists and neural pathways.
Observed two independent clauses merged with zero connecting punctuation or conjunctions.
Fusing two independent clauses without punctuation forms a run-on sentence.

Key Concept

Sentence Boundaries (Avoiding Fragments, Comma Splices, and Fused Sentences)
Estimated Time:2m 0s
Question 13Question →

Read the following excerpt from a draft essay on behavioral economics:

"Although behavioral economists have long demonstrated that human decision-making is heavily influenced by cognitive biases, traditional macroeconomic models continue to assume perfect rationality, however, recent empirical studies from neuroeconomics are beginning to bridge this theoretical divide."

Which of the following revisions corrects the sentence boundary error while maintaining standard English conventions and preserving the original meaning of the excerpt?

Show answer & explanation

Answer: Although behavioral economists have long demonstrated that human decision-making is heavily influenced by cognitive biases, traditional macroeconomic models continue to assume perfect rationality; however, recent empirical studies from neuroeconomics are beginning to bridge this theoretical divide.

Answer

The correct revision places a semicolon before the conjunctive adverb 'however' to join the two independent clauses while preserving the introductory dependent clause intact.
The correct option addresses the comma splice by inserting a semicolon before the conjunctive adverb 'however'. The first part of the sentence contains an introductory dependent clause introduced by 'Although', which is correctly attached to the first independent clause ('traditional macroeconomic models continue to assume perfect rationality'). Because the clause following 'however' ('recent empirical studies... divide') is also independent, joining these two complete thoughts requires a semicolon before 'however' and a comma after it.

Step-by-Step Solution

1
Analyze the syntactic structure of the original draft sentence.
Identified an introductory dependent clause ('Although behavioral economists... cognitive biases'), followed by the first independent clause ('traditional macroeconomic models... rationality'), and a second independent clause introduced by a conjunctive adverb ('however, recent empirical studies... divide').
Deconstructing clause boundaries reveals how ideas are connected and where punctuation breaks down.
2
Identify the punctuation error separating the independent clauses.
A comma splice occurs because a single comma precedes the conjunctive adverb 'however' when connecting two complete independent thoughts.
Conjunctive adverbs such as 'however', 'furthermore', and 'therefore' cannot join independent clauses with only a comma.
3
Evaluate the revisions to ensure grammatical completeness and correct punctuation.
The revision using a semicolon before 'however' properly joins the two independent clauses without introducing sentence fragments or fused elements.
A semicolon combined with a conjunctive adverb and comma establishes a valid coordinate boundary between independent clauses.

Key Concept

Sentence Boundaries: Correcting Comma Splices with Conjunctive Adverbs
Estimated Time:1m 30s
Grammar, Syntax & Standard English Conventions Practice Questions — GRE General Test | Examkin