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Grammatical Structure

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Question 321Question →

Complete the sentence below by filling in the blank with the correct modal verb phrase to express a past unfulfilled obligation.

Fill in the blanks below

Following the sudden failure of the primary cooling system, the senior technician stated that the operator switched on the emergency backup generator immediately.
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Answer

should have (or ought to have)
The phrase 'should have' (or 'ought to have') combined with the past participle 'switched' correctly expresses that the operator had an obligation or recommendation in the past that was not carried out.

Step-by-Step Solution

1
Analyze the temporal context and meaning of the sentence
The event occurred in the past ('stated', 'switched') and describes an action that was required/advisable but was not carried out.
The sentence expresses criticism or regret about a past omission.
2
Identify the appropriate modal structure for past unfulfilled obligation
The structure required is modal auxiliary ('should' or 'ought to') + 'have' + past participle ('switched').
'Should have' or 'ought to have' is the standard grammatical construction in English for an action that ought to have happened in the past but did not.

Key Concept

Expressing Past Unfulfilled Obligation or Regret
Question 322Question →

Despite expressing initial reservations regarding the corporate reorganization, the managing director was ultimately compelled to acquiesce _____ the strategic decisions formulated by the executive committee. Which preposition correctly completes the sentence?

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Answer: in

Answer

The correct preposition is 'in'.
The verb 'acquiesce' standardly collocates with the preposition 'in' when indicating quiet agreement, submission, or compliance with a decision, proposal, or rule.

Step-by-Step Solution

1
Identify the head verb requiring a dependent preposition in the sentence.
The target verb is 'acquiesce'.
Dependent prepositions are governed by the specific head word preceding the blank.
2
Determine the standard formal preposition that collocates with 'acquiesce' when accepting a decision or policy.
'Acquiesce' takes the preposition 'in' (to acquiesce in something).
Standard formal English grammar dictates that one acquiesces in a decision, arrangement, or policy.
3
Evaluate the choices to select the grammatically appropriate preposition.
'in' is the only correct preposition.
Substitutions such as 'to', 'with', or 'on' violate established prepositional collocation rules for this verb.

Key Concept

Dependent Prepositions and Fixed Verb-Preposition Collocations
Estimated Time:1m 0s
Question 323Question →

Select the appropriate conjunction to complete the dependent clause in the sentence below.

Fill in the blanks below

Hardly had the research team published their findings rival laboratories began attempting to replicate the experiment.
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Answer

The conjunction 'when' (or 'before') correctly completes the correlative structure starting with 'Hardly'.
In standard English grammar, the restrictive adverb 'hardly' requires the subordinating conjunction 'when' (or 'before') to introduce the time clause that follows.

Step-by-Step Solution

1
Identify the introductory negative adverbial element.
The sentence opens with 'Hardly had', which triggers subject-auxiliary inversion.
Sentences starting with negative or restrictive adverbs require inversion in the main clause.
2
Apply the standard correlative conjunction rule.
The adverb 'hardly' correlates with 'when' (or 'before') to indicate that one event occurred immediately after another.
Using 'than' is ungrammatical here because 'than' strictly pairs with comparative adverbs such as 'no sooner'.

Key Concept

Correlative Conjunctions with Inverted Clauses
Question 324Question →

Which sentence correctly uses an adverb to modify an adjective?

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Answer: The speaker gave an exceptionally brilliant presentation on environmental conservation.

Answer

The sentence 'The speaker gave an exceptionally brilliant presentation on environmental conservation.' is grammatically correct.
The statement 'The speaker gave an exceptionally brilliant presentation on environmental conservation.' correctly uses the adverb 'exceptionally' to modify the adjective 'brilliant', describing the degree of brilliance of the presentation.

Step-by-Step Solution

1
Identify the target modifier and the word it modifies in the sentence.
The word modifying 'brilliant' (which is an adjective) must function as an adverb of degree.
Adjectives modify nouns, whereas adverbs modify verbs, adjectives, or other adverbs.
2
Evaluate the form of the modifier in each sentence option.
'Exceptionally' is the correct adverbial form derived from the adjective 'exceptional'.
An adjective cannot directly modify another adjective without taking an adverbial form (-ly ending in this context).
3
Verify sentence structure and modifier attachment.
The sentence where 'exceptionally' modifies 'brilliant' directly within a clear subject-verb structure is free from dangling modifier errors.
Ensures full compliance with standard English grammatical rules.

Key Concept

Adverbs Modifying Adjectives
Estimated Time:45s
Question 325Question →

During the official administrative audit, each of the principal investigators supervising the multi-center medical research project submitted _____ analytical report directly to the ethics governing council.

Which pronoun best fits the blank to ensure standard formal pronoun-antecedent agreement?

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Answer: his or her

Answer

The possessive pronoun phrase 'his or her' is correct because the true subject and antecedent is the singular indefinite pronoun 'each'.
The sentence relies on the singular indefinite pronoun 'each' as its grammatical antecedent. In formal English examination standards (such as JAMB UTME), singular indefinite pronouns ('each', 'every', 'everyone', 'either', 'neither') must be followed by singular possessive pronouns. Therefore, 'his or her' correctly maintains singular concord.

Step-by-Step Solution

1
Identify the true grammatical antecedent in the sentence clause.
The core antecedent is the indefinite pronoun 'each'. The phrase 'of the principal investigators' is an intervening prepositional phrase.
Nouns located within prepositional phrases do not change the grammatical number of the sentence subject/antecedent.
2
Determine the required number and case of the modifier needed for the blank.
Since 'each' is grammatically singular and modifies the noun phrase 'analytical report', a singular possessive pronoun/determiner is required.
Formal English rules mandate that singular indefinite antecedents take singular possessive pronouns.
3
Select the option that strictly adheres to formal singular pronoun-antecedent agreement.
'his or her' maintains singular agreement with 'each'.
Plural pronouns such as 'their' violate formal concord rules in traditional examination contexts.

Key Concept

Pronoun-Antecedent Concord with Singular Indefinite Pronouns
Question 326Question →

Complete the sentence below by filling in the blanks with the correct uncountable noun forms.

Fill in the blanks below

The defense counsel requested further regarding the witness testimonies, pointing out that several important pieces of had been left out of the case file.
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Answer

The first blank requires 'information' and the second blank requires 'evidence'.
Both 'information' and 'evidence' are uncountable nouns in standard English grammar. They cannot take plural suffixes such as '-s'. To denote plural quantities, partitive expressions (like 'pieces of') are attached while the noun root remains singular in form.

Step-by-Step Solution

1
Analyze the grammatical countability of the noun required for the first blank.
The word 'information' is an uncountable (mass) noun.
Uncountable nouns in English do not take an inflectional plural suffix '-s' regardless of quantity.
2
Analyze the partitive construction 'pieces of' preceding the second blank.
The noun 'evidence' functions as an uncountable noun in this context, quantified by the partitive phrase 'pieces of'.
Partitive phrases like 'pieces of' are used to express discrete quantities of non-count nouns without pluralizing the noun head itself.

Key Concept

Non-count Nouns and Partitive Quantifiers
Estimated Time:1m 0s
Question 327Question →

In formal grammatical analysis, establishing proper pronoun-antecedent agreement requires accurately isolating the head noun from intervening modifiers. Which option correctly completes the sentence below?

'Each of the female diplomats who participated in the bilateral negotiations was requested to present _____ report to the envoy.'

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Answer: her

Answer

The singular feminine possessive determiner 'her' is the correct answer because the true grammatical antecedent is the singular indefinite subject 'Each'.
The correct answer utilizes the singular feminine possessive pronoun because the grammatical antecedent is 'Each', a singular indefinite pronoun. In formal standard English, singular indefinite pronouns maintain singular concord regardless of plural modifying phrases that follow them.

Step-by-Step Solution

1
Identify the true syntactic antecedent of the pronoun slot in the main clause.
The subject of the main sentence is 'Each of the female diplomats'. The head word is the singular indefinite pronoun 'Each', while 'of the female diplomats' is a prepositional modifier.
Intervening prepositional phrases and relative clauses ('who participated in the bilateral negotiations') do not alter the singular grammatical number of the head subject.
2
Determine the required grammatical gender and number for the possessive pronoun.
The head antecedent 'Each' is singular, and the prepositional phrase specifies gender as female ('female diplomats'). Thus, a singular feminine possessive determiner is required.
Formal pronoun-antecedent agreement in JAMB UTME requires strict concordance in both number (singular) and gender (feminine).
3
Select the option that matches the required form.
'her' functions as the singular feminine possessive determiner modifying 'report'.
It fulfills all syntactical requirements without falling into proximity error or gender mismatch.

Key Concept

Pronoun-Antecedent Agreement with Singular Indefinite Pronouns
Question 328Question →

Complete the sentence below by supplying the grammatically correct verb form that maintains proper subject-verb agreement.

Fill in the blanks below

Neither the lead architect nor the site engineers satisfied with the quality of the building materials delivered last week.
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Answer

were
When two subjects are joined by 'neither...nor', the rule of proximity dictates that the verb agrees with the subject closest to it. Here, the plural noun phrase 'the site engineers' is closest to the verb position, making the plural past-tense verb 'were' the grammatically correct choice.

Step-by-Step Solution

1
Identify the subjects and the conjunction connecting them.
The singular subject 'the lead architect' and the plural subject 'the site engineers' are connected by the correlative conjunction 'neither...nor'.
Sentences using 'neither...nor' are governed by the principle of proximity concord.
2
Apply the rule of proximity concord.
The verb must agree in number with the subject closer to it, which is the plural noun phrase 'the site engineers'.
When subjects of different numbers are joined by 'neither...nor', the verb takes the person and number of the nearer subject.
3
Select the correct tense and agreement form for the blank.
The plural past-tense verb form required is 'were'.
The temporal marker 'last week' indicates a completed past action, requiring past tense.

Key Concept

Proximity Concord with Correlative Conjunctions
Estimated Time:1m 0s
Question 329Question →

Which of the following sentences demonstrates correct modifier placement and proper adverbial usage without creating grammatical ambiguity?

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Answer: Determined to resolve the persistent administrative bottleneck, the vice-chancellor promptly appointed an independent advisory committee.

Answer

The sentence where the vice-chancellor is the immediate subject following the introductory modifier and the adverb appropriately modifies the verb.
The correct sentence appropriately places the human subject ('the vice-chancellor') directly after the introductory participial phrase, ensuring proper modifier alignment. Additionally, it uses the correct adverbial form to modify the verb and respects natural adjective ordering.

Step-by-Step Solution

1
Identify the introductory modifying phrase
The phrase 'Determined to resolve the persistent administrative bottleneck' is an adjectival participial phrase requiring an agent capable of determination.
Participial modifiers at the beginning of a sentence must logically modify the agent named as the subject of the main clause.
2
Evaluate the subject of the main clause in each option
Only options featuring 'the vice-chancellor' directly after the comma correctly link the modifier to a human agent capable of determination.
An abstract entity such as 'an independent advisory committee' cannot possess determination, creating a dangling modifier error.
3
Check the form and placement of the adverb and adjectives
The word modifying the verb 'appointed' must take the adverbial form '-ly', and adjectives must follow the natural order of opinion/quality before classification.
Adverbs modify verbs, whereas qualitative adjectives precede classifying adjectives in noun phrase word order.

Key Concept

Participial Modifier Attachment and Adverbial Modification
Estimated Time:1m 30s
Question 330Question →

Which of the following connectives correctly completes the sentence below?

"Hardly had the tribunal delivered its final verdict __________ the aggrieved party filed an appeal in the high court."

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Answer: when

Answer

The correct option is 'when'.
The connective 'when' is the grammatically correct subordinator because the semi-negative adverb 'hardly' introduces a clause with inverted word order ('hardly had...'), which strictly demands 'when' (or 'before') to introduce the subsequent time clause.

Step-by-Step Solution

1
Analyze the main clause structure and initial adverbial modifier
The sentence begins with the restrictive negative adverb 'Hardly' followed by subject-auxiliary inversion ('had the tribunal delivered').
Recognizing negative inversion establishes the correlative conjunction requirement.
2
Identify the mandatory correlative pairing
In formal English clause structure, 'hardly' and 'scarcely' pair exclusively with 'when' (or 'before'), whereas 'no sooner' pairs with 'than'.
Correlative conjunctions operate under strict structural co-occurrence rules.
3
Evaluate the options against standard grammatical conventions
'when' correctly connects the subordinate clause detailing the immediate subsequent event.
Only 'when' satisfies both the semantic temporal relationship and the grammatical rule of correlative pairing.

Key Concept

Correlative Conjunctions and Negative Inversion Clause Structure
Question 331Question →

Complete the sentence below by supplying the correct preposition to fill the blank space.

Fill in the blanks below

The tribunal determined that the arbitrary seizure of private property was completely inimical the principles of economic stability.
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Answer

The correct preposition to fill the blank is 'to'.
The adjective 'inimical' (meaning injurious or opposing) standardly takes the dependent preposition 'to' when indicating the object affected. Therefore, 'inimical to the principles' is the only grammatically correct phrasing.

Step-by-Step Solution

1
Identify the key head word governing the blank.
The governing adjective is 'inimical', which means harmful, hostile, or adverse.
Prepositions in formal English structure are often idiomatically fixed to preceding adjectives.
2
Select the correct dependent preposition for 'inimical'.
'Inimical' strictly requires the dependent preposition 'to' (inimical to something).
Collocating 'inimical' with 'with', 'for', or 'against' violates standard English prepositional complement rules.

Key Concept

Dependent prepositions following adjectives
Estimated Time:1m 30s
Question 332Question →

Read the sentence below:

'The committee rejected the proposed financial report because its executive summary was completely devoid _____ verifiable supporting documentation.'

Which preposition correctly completes the sentence?

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Answer: of

Answer

The correct preposition is 'of'.
The adjective 'devoid' standardly collocates with the preposition 'of' when indicating a complete lack or absence of a quality, feature, or item.

Step-by-Step Solution

1
Identify the target adjective in the sentence requiring a dependent preposition.
The word 'devoid' functions as a predicate adjective meaning 'entirely lacking or free from'.
Adjectives in English frequently require specific dependent prepositions to complete their prepositional complement.
2
Determine the standard prepositional collocation for 'devoid'.
The established grammatical structure is 'devoid of [something]'.
Standard English grammar dictates that 'devoid' collocates exclusively with 'of'.

Key Concept

Dependent prepositions following adjectives
Estimated Time:45s
Question 333Question →

In the statement below, which verb form grammatically completes the clause expressing an action that is overdue?

'The department manager emphasized to the team that it is high time they _______ their monthly performance reports.'

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Answer: submitted

Answer

The correct option is 'submitted'.
The simple past verb form 'submitted' is correct because the phrase 'it is high time' followed by a subject requires the simple past tense to express an action that is long overdue.

Step-by-Step Solution

1
Identify the key grammatical expression in the sentence structure.
The clause begins with 'it is high time they...'
The idiomatic structure 'it is high time' sets up an unreal past requirement.
2
Select the appropriate verb tense required by this structure.
The verb following the subject 'they' must be in the simple past tense ('submitted').
When 'it is high time' is followed by a personal subject, English grammar mandates the use of the simple past tense to indicate that an action ought to have been done already.

Key Concept

Unreal Past Tense following 'It is high time'
Question 334Question →

Read the excerpt below from an official report on maritime operations:

'If the navigation officer _______ the weather advisory before setting sail, the vessel would not have encountered the severe storm.'

Which of the following options correctly completes the sentence?

Show answer & explanation

Answer: had received

Answer

The past perfect verb form 'had received' correctly completes the conditional clause.
The sentence represents a standard third conditional construction. In third conditional sentences, the condition clause introduced by 'if' must take the past perfect tense ('had received') to pair correctly with the past modal perfect ('would not have encountered') in the main clause.

Step-by-Step Solution

1
Identify the conditional structure of the sentence.
The sentence presents a third conditional (past counterfactual) scenario, evidenced by the result clause 'would not have encountered'.
A third conditional describes an unreal past situation and its hypothetical outcome in past time.
2
Determine the required verb tense for the subordinate conditional clause.
The dependent clause introduced by 'if' requires the past perfect structure ('had' + past participle).
Standard grammatical rules dictate that an 'if'-clause expressing an unfulfilled past condition must use the past perfect tense.

Key Concept

Third Conditional Tense-Aspect Agreement
Question 335Question →

Which of the following verb pairs correctly completes the sentence below in accordance with the rules of subject-verb agreement (concord)?

"Neither the lead investigator nor the senior analysts on the research team, along with the project coordinator, _______ willing to admit that each of the newly submitted reports _______ critical empirical errors."

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Answer: are / contains

Answer

The verb pair 'are / contains' correctly completes the sentence.
The verb pair featuring 'are' and 'contains' is correct because: (1) In correlated structures with 'neither... nor', the verb agrees with the nearer subject element ('the senior analysts', which is plural), and parenthetical additions such as 'along with the project coordinator' do not alter subject number; (2) The indefinite pronoun 'each' functions as a singular head noun and requires a singular verb ('contains') regardless of the plural noun 'reports' inside the modifying prepositional phrase.

Step-by-Step Solution

1
Analyze the first clause subject structure: 'Neither the lead investigator nor the senior analysts... along with the project coordinator'.
The correlated conjunction rule states that when subjects are joined by 'neither... nor', the verb must agree with the subject closest to it ('senior analysts', which is plural). Parenthetical expressions introduced by 'along with' do not change the grammatical number of the subject.
The verb for the first blank must be plural ('are').
2
Analyze the second clause subject structure: 'each of the newly submitted reports'.
The head of the noun phrase is the indefinite pronoun 'each', which is strictly singular. The plural object of the preposition ('reports') does not alter the singular nature of the head pronoun.
The verb for the second blank must be singular ('contains').
3
Combine the results of both clauses.
The correct sequence of verb forms is 'are' for the first blank and 'contains' for the second blank.
Matching both grammatical rules yields 'are / contains'.

Key Concept

Correlated Conjunction Agreement and Indefinite Pronoun Concord
Question 336Question →

Read the sentence below carefully. Which form of the verb 'enact' correctly completes the sentence to express an unreal past subjunctive construction?

Fill in the blanks below

The dean reminded the department heads that it was high time they the revised curriculum for the upcoming accreditation exercise.
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Answer

enacted
The expression 'it is high time' (and its backshifted form 'it was high time') requires the past simple tense (unreal past/past subjunctive) to indicate an overdue obligation. Therefore, the simple past form 'enacted' is the only grammatically correct choice.

Step-by-Step Solution

1
Analyze the grammatical structure of the sentence.
The clause is introduced by the subjunctive formula 'it was high time' (derived from 'it is high time').
English grammatical rules require structures following 'it is (high/about) time' to take a past simple verb form when referring to an action that is overdue.
2
Select the correct form of the target verb 'enact'.
The past simple form 'enacted' must be inserted into the blank.
Although the communicative context relates to present or urgent necessity, the past tense form 'enacted' functions as a past subjunctive to express unreal past mood.

Key Concept

Unreal Past Subjunctive after 'it is high time'
Estimated Time:1m 0s
Question 337Question →

Which of the following verb combinations correctly completes the sentence below?

"Dr. Okon is one of those dedicated researchers who _______ late into the night, yet neither of his laboratory technicians _______ willing to work overtime."

Show answer & explanation

Answer: stay / is

Answer

stay / is
The correct verb combination is 'stay / is'. In the first clause, the relative pronoun 'who' refers to the plural antecedent 'researchers' in the construction 'one of those [plural noun] who', necessitating the plural verb 'stay'. In the second clause, the subject is the singular indefinite pronoun 'neither', which requires the singular verb 'is' regardless of the plural noun 'technicians' in the modifying phrase.

Step-by-Step Solution

1
Analyze the subject and antecedent in the first clause.
In the construction 'one of those [plural noun] who...', the relative pronoun 'who' refers to the plural head noun 'researchers', not 'one'.
Relative clauses modify their immediate antecedent. Since 'researchers' is plural, the relative clause verb must also be plural ('stay').
2
Analyze the subject in the second clause.
The subject is the indefinite pronoun 'neither'.
Indefinite pronouns such as 'neither', 'either', and 'each' take singular verbs when followed by a prepositional phrase ('of his laboratory technicians'). The plural object of the preposition does not change the grammatical number of the subject head.
3
Select the verb combination that satisfies both clauses.
The first blank requires 'stay' (plural) and the second blank requires 'is' (singular).
This combination strictly adheres to both relative antecedent agreement and indefinite pronoun agreement.

Key Concept

Relative Clause Antecedent Agreement & Indefinite Pronoun Concord
Estimated Time:1m 30s
Question 338Question →

Which preposition correctly completes the sentence below?

Fill in the blanks below

It is a serious criminal offense for any individual to tamper official election documents.
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Answer

with
The verb 'tamper' takes the dependent preposition 'with' to form the standard collocation meaning to meddle with or make illegal modifications to something.

Step-by-Step Solution

1
Identify the head verb in the predicate that requires a dependent preposition.
The verb in context is 'tamper'.
Certain English verbs require specific dependent prepositions to complete their grammatical and semantic meaning.
2
Select the standard dependent preposition that collocates with 'tamper'.
The correct preposition is 'with'.
The fixed verb-preposition combination 'tamper with' means to make unauthorized, illegal, or damaging alterations to something.

Key Concept

Dependent Prepositions and Verb Collocations
Question 339Question →

During the parliamentary inquiry, the committee chairman asserted that the proposed legislative amendment was not consonant _____ the fundamental provisions of the national constitution. Which preposition correctly completes the sentence?

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Answer: with

Answer

The correct preposition is 'with', completing the phrase 'consonant with'.
The word 'consonant' functions as an adjective meaning consistent or in harmony. In standard formal English grammar, it takes the dependent preposition 'with' to complete its prepositional phrase.

Step-by-Step Solution

1
Identify the head adjective requiring a dependent preposition in the sentence.
The adjective in focus is 'consonant', which denotes agreement, harmony, or compatibility.
English adjectives of accord or harmony take specific fixed prepositions.
2
Determine the standard prepositional collocation for 'consonant'.
'Consonant' standardly pairs with 'with' (e.g., 'consonant with the law').
Using alternative prepositions like 'to', 'for', or 'by' violates formal idiom rules in Use of English.

Key Concept

Fixed Adjective-Preposition Collocations
Estimated Time:1m 15s
Question 340Question →

Despite the severe drought affecting the entire province, the agricultural cooperative recorded an unprecedented crop yield; they __________ adopted the newly introduced soil-moisture retention technique. Which modal auxiliary phrase correctly completes the sentence to express a logical deduction about a past event?

Show answer & explanation

Answer: must have

Answer

The correct phrase is 'must have', which forms the modal past perfect to express a strong logical deduction about a completed past action.
The modal phrase 'must have' correctly expresses a logical deduction or high degree of certainty regarding a past action based on clear circumstantial evidence.

Step-by-Step Solution

1
Analyze the context of the sentence
The context provides strong evidence (an unprecedented crop yield during a severe drought) pointing to a logical conclusion about a past event.
Identifying sentence context determines the intended modality (e.g., possibility, obligation, or logical deduction).
2
Select the appropriate modal structure for past logical deduction
The structure 'modal verb (must) + have + past participle (adopted)' is required.
Logical deduction regarding past events requires the perfective modal structure without extra infinitive markers or double modals.
3
Eliminate ungrammatical verb forms
Reject forms with superfluous 'to' infinitives, double modals, or incorrect verb inflections.
Modal auxiliaries in English are defective verbs that cannot be inflected with '-ed' or combined directly with other modal verbs.

Key Concept

Modal Auxiliaries expressing past logical deduction
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