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Grammatical Structure

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Question 641Question →

Fill in the blank with the most appropriate adverb to complete the sentence below correctly.

Fill in the blanks below

Although the dissertation was lengthy and contained complex technical terminology, the review board found its core thesis convincing.
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Answer

The blank is correctly filled by an adverb of degree such as 'remarkably', 'exceptionally', 'highly', 'exceedingly', or 'thoroughly'.
The sentence requires an adverb of degree to modify the participial adjective 'convincing'. Adverbs such as 'remarkably', 'exceptionally', 'highly', 'exceedingly', or 'thoroughly' correctly fulfill this modifying function while preserving the logical contrast introduced by the opening conjunction 'Although'.

Step-by-Step Solution

1
Analyze the sentence structure to determine the part of speech required for the blank.
The word following the blank is 'convincing', which serves as a predicate adjective modifying 'core thesis'.
A word modifying an adjective must function as an adverb.
2
Select a grammatically and contextually accurate modifier of degree.
Adverbs of degree like 'remarkably', 'exceptionally', or 'highly' intensify the adjective 'convincing' and contrast logically with the complexity mentioned in the concessive clause.
Adverbs ending in '-ly' that express degree properly intensify adjectives without creating modifier confusion or concord errors.

Key Concept

Adverbs modifying adjectives
Question 642Question →

Complete the sentence by entering the grammatically correct verb phrase in the blank provided.

Fill in the blanks below

If the board of directors had approved the budget restructuring last quarter, the firm facing liquidation today.
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Answer

would not be
The sentence tests mixed conditional alignment, where an unfulfilled condition in the past ('had approved') leads to a present ongoing result denoted by 'today'. The main clause requires 'would' (or 'wouldn't') followed by the bare infinitive 'be' preceding the present participle 'facing'. Therefore, 'would not be' (or 'wouldn't be') is the grammatically correct response.

Step-by-Step Solution

1
Analyze the conditional clause structure
The dependent 'if'-clause uses the past perfect tense ('had approved'), denoting an unreal past condition.
Recognizing the past unreal condition establishes the baseline for mixed conditional rules.
2
Examine the temporal adverbial marker in the main clause
The main clause ends with 'today', specifying that the consequence is in the present time frame.
A past unreal condition with a present result requires a mixed conditional structure.
3
Select the appropriate modal verb aspect
The combination of 'would' + base verb ('not be') completes the progressive continuous aspect ('facing liquidation').
'Would not be' accurately reflects the present hypothetical state stemming from the past unreal event.

Key Concept

Mixed Conditionals (Past Unreal Condition with Present Consequence)
Estimated Time:1m 0s
Question 643Question →

Read the direct speech sentence below and complete its indirect speech transformation by supplying the correct words for the blanks.

Fill in the blanks below

Direct speech: "If the team does not complete the seabed survey tomorrow," the marine biologist explained, "we shall forfeit our research permit."

Indirect speech: The marine biologist explained that if the team not complete the seabed survey , they forfeit their research permit.
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Answer

blank_1: did; blank_2: the following day (or the next day); blank_3: would
When converting direct speech into indirect speech introduced by a past-tense reporting verb ('explained'), the simple present auxiliary 'does' backshifts to 'did', the future time adverbial 'tomorrow' changes to 'the following day' or 'the next day', and the modal 'shall' shifts to 'would' alongside the pronoun change from 'we' to 'they'.

Step-by-Step Solution

1
Backshift the present simple verb in the conditional clause.
The auxiliary 'does' changes to past tense 'did'.
Since the reporting verb 'explained' is in the past tense, simple present auxiliary verbs backshift to the simple past tense in reported speech.
2
Transform the time adverbial expressing future time.
'tomorrow' becomes 'the following day' or 'the next day'.
Time adverbials pointing to the future must shift to reflect the past timeframe of reporting.
3
Adjust the modal verb and personal pronoun for indirect reporting.
The first-person pronoun 'we' becomes 'they', and the modal 'shall' backshifts to 'would'.
When 'we' is reported as third-person 'they' to express a future consequence, 'shall' shifts to 'would'.

Key Concept

Tense backshift, time adverbial transformation, and modal adaptation in indirect speech
Estimated Time:1m 30s
Question 644Question →

Which verb form correctly completes the sentence below to express a hypothetical past condition?

Fill in the blanks below

Had the chief forensic auditor the discrepancies in the financial ledgers earlier, the board would have prevented the severe loss.
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Answer

The past participle verb form 'uncovered' (or 'discovered' / 'detected' / 'identified') correctly completes the inverted past perfect clause.
In an inverted third conditional clause where the conditional marker 'if' is omitted, the auxiliary 'Had' moves to the initial position before the subject and must be followed by a past participle (such as 'uncovered') to form the past perfect aspect matching the result clause ('would have prevented').

Step-by-Step Solution

1
Identify the clause structure and conditional type.
The sentence opens with an inverted conditional structure initiated by the auxiliary verb 'Had' without the conjunction 'if'.
An inverted third conditional structure places 'Had' before the subject to express an unfulfilled past hypothesis.
2
Determine the required grammatical form for the main verb following the auxiliary.
The past perfect construction demands the past participle form of the main verb (e.g., 'uncovered').
In third conditional sentences, the condition clause requires the past perfect aspect ('had' + past participle) to pair grammatically with the perfect conditional result clause ('would have prevented').

Key Concept

Inverted Third Conditional and Past Perfect Aspect
Estimated Time:1m 30s
Question 645Question →

In the sentence below, which verb appropriately fills the gap according to standard rules of agreement?

'Dr. Okon is the only one of the senior researchers who ______ managed to secure international funding for the project.'

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Answer: has

Answer

The correct option is 'has'.
In English concord rules, when a relative clause follows the structure 'the only one of + plural noun', the relative pronoun refers back to 'the only one' (singular), not the plural noun. Therefore, the singular auxiliary verb 'has' is required.

Step-by-Step Solution

1
Identify the subject and structure of the relative clause.
The sentence contains a relative clause introduced by 'who', which modifies the noun phrase preceding it.
Determining the true antecedent of a relative pronoun is necessary to establish subject-verb concord.
2
Distinguish between 'one of those who' and 'the only one of those who'.
While 'one of the researchers who...' takes a plural verb, the construction 'the only one of the researchers who...' restricts the subject to a single individual ('the only one').
The word 'only' shifts the emphasis to the singular head noun 'one', making 'who' refer to a singular entity.
3
Select the verb form that agrees in number and tense with the singular antecedent.
The singular present-perfect auxiliary verb 'has' correctly satisfies subject-verb concord.
A singular antecedent requires a singular verb.

Key Concept

Subject-relative clause agreement with 'the only one of...'
Question 646Question →

Which relative pronoun correctly completes the subordinate relative clause in the sentence below?

Fill in the blanks below

The distinguished legal scholar, with the committee consulted on the constitutional amendment, advised against rushing the legislation.
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Answer

The correct relative pronoun is 'whom' because it functions as the object of the preposition 'with'.
The relative pronoun serves as the object of the preposition 'with' in the non-restrictive relative clause. In formal grammatical structure, prepositions governing personal relative pronouns demand the objective case form 'whom'.

Step-by-Step Solution

1
Analyze the grammatical function of the pronoun within the relative clause.
The relative pronoun directly follows the preposition 'with' and refers to a person ('legal scholar').
Prepositions must govern objective-case pronouns when introducing relative clauses.
2
Select the objective case form of the personal relative pronoun.
'Whom' is the objective form, whereas 'who' is subjective and 'whose' is possessive.
'With who' breaks formal grammatical concord, requiring the objective pronoun 'whom'.

Key Concept

Relative Clause Connectors and Prepositional Case Concord
Estimated Time:1m 0s
Question 647Question →

Complete the sentence by filling in the blank with the pronoun that maintains correct grammatical agreement in formal English.

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The committee of maritime historians, after weeks of examining the shipwreck artifacts, finally published comprehensive report on the vessel's origin.
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Answer

its
The possessive pronoun 'its' correctly agrees with the singular collective noun antecedent 'committee', which acts as a unified body in publishing the report.

Step-by-Step Solution

1
Identify the antecedent of the pronoun.
The antecedent is the collective noun phrase 'The committee of maritime historians'.
Finding the head noun determines the number and person required for pronoun agreement.
2
Determine if the collective noun acts as a single body or as separate individuals.
The action of publishing a single unified report indicates that the committee functioned as one collective unit.
When a collective noun functions as a single entity, it takes a singular neuter pronoun.
3
Select the correct singular possessive pronoun.
The third-person singular neuter possessive pronoun is 'its'.
'Its' agrees in gender and number with the singular collective entity 'committee'.

Key Concept

Pronoun-Antecedent Agreement with Collective Nouns
Estimated Time:1m 0s
Question 648Question →

Complete the sentence below by supplying the grammatically correct present tense verb that satisfies the rules of subject-verb concord.

Fill in the blanks below

Either the senior manager or the department supervisors expected to present the quarterly budget proposal.
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Answer

The correct verb to fill the blank is 'are'.
In English grammatical concord, when two subjects are connected by the correlative conjunction 'either... or', the verb must agree in number with the subject noun phrase closest to it (proximity concord). Here, the plural noun phrase 'the department supervisors' is closest to the blank, requiring the plural verb 'are'.

Step-by-Step Solution

1
Identify the compound subject and its connecting conjunction.
The subject consists of 'the senior manager' (singular) and 'the department supervisors' (plural) connected by 'Either... or'.
Correlative conjunctions like 'either... or' join two distinct subject elements.
2
Apply the rule of proximity concord.
The verb must agree with the subject closest to the blank, which is 'the department supervisors'.
When subjects of different grammatical numbers are joined by 'either... or', proximity concord dictates that the verb matches the number of the nearest subject.
3
Select the correct plural present tense verb.
'are' is chosen.
Since 'supervisors' is plural, the plural verb form 'are' is required.

Key Concept

Proximity Concord with Correlative Conjunctions
Question 649Question →

The board of directors insisted that the chief executive officer ________ a full financial audit before the end of the fiscal quarter. Which of the following verb forms correctly completes the sentence?

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Answer: undertake

Answer

The correct verb form is 'undertake'. In formal English, verbs expressing commands, demands, resolutions, or insistence (such as 'insist', 'recommend', 'demand', 'propose') are followed by a subordinate clause in the mandative subjunctive mood, which requires the base/uninflected form of the verb regardless of the subject.
The choice 'undertake' is correct because the verb 'insisted' triggers the mandative subjunctive mood in the following 'that'-clause. The mandative subjunctive takes the uninflected base form of the verb ('undertake') regardless of whether the subject is singular or plural, or whether the main verb is in the past tense.

Step-by-Step Solution

1
Identify the governing main verb and clause structure
The main verb is 'insisted', followed by a 'that'-clause expressing an order or demand.
Verbs of demand or insistence govern the mandative subjunctive mood in subordinate clauses.
2
Determine the required subjunctive verb form
The mandative subjunctive requires the bare infinitive (base form) of the verb without any tense inflections (-s, -ed) or auxiliary verbs.
Even with a third-person singular subject like 'the chief executive officer', the subjunctive mood uses the uninflected base verb ('undertake').

Key Concept

Mandative Subjunctive Mood
Question 650Question →

Which of the following sentences correctly places the participial modifier to ensure logical and grammatical clarity?

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Answer: Having thoroughly analyzed the survey data, the committee recommended several structural reforms.

Answer

Having thoroughly analyzed the survey data, the committee recommended several structural reforms.
The sentence placing 'the committee' as the subject of the main clause correctly aligns the introductory participial phrase 'Having thoroughly analyzed the survey data' with the logical actor performing the analysis.

Step-by-Step Solution

1
Identify the introductory participial modifier phrase.
The phrase 'Having thoroughly analyzed the survey data' describes an action that requires an active agent.
In English grammar, an introductory participial phrase must be immediately followed by the subject that performs the action described.
2
Evaluate the subject of the main clause in each choice.
The option placing 'the committee' immediately after the comma provides the correct logical subject.
'Reforms' or 'a report' cannot perform the act of analyzing survey data.

Key Concept

Participial Modifier Placement and Subject Alignment
Question 651Question →

Which of the following verb forms correctly completes the sentence? 'The principal, together with his dedicated assistants, _____ expected to present the annual report at the board meeting.'

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Answer: is

Answer

The singular verb form 'is' correctly completes the sentence because the true grammatical subject is the singular noun 'The principal'.
The sentence requires the singular present verb form because the grammatical subject is the singular noun phrase 'The principal'. Phrases attached using 'together with' do not form compound plural subjects.

Step-by-Step Solution

1
Identify the true head noun of the subject clause.
The head noun is 'principal' (singular). The phrase 'together with his dedicated assistants' is parenthetical.
Expressions such as 'together with', 'as well as', and 'along with' introduce prepositional modifiers, not coordinating conjunctions.
2
Select the verb form that agrees in number with the head noun.
The singular verb 'is' agrees with the singular noun 'principal'.
A singular subject requires a singular verb regardless of plural nouns in intervening modifier phrases.

Key Concept

Parenthetical Concord / Error of Proximity
Estimated Time:45s
Question 652Question →

Read the sentence below carefully:

'Every one of the senior researchers who participated in the multi-center clinical trials _____ required to disclose any potential conflict of interest before the final report is published.'

Which option correctly completes the sentence to satisfy the rules of subject-verb agreement?

Show answer & explanation

Answer: is

Answer

The correct verb form is 'is'.
The correct option is 'is' because the head of the subject phrase is the indefinite expression 'Every one', which is grammatically singular. The plural nouns 'researchers' and 'trials' appear within modifying structures (a prepositional phrase and a relative clause) and do not affect the singular concord required by the head noun.

Step-by-Step Solution

1
Identify the main clause and locate the grammatical subject.
The main subject phrase is 'Every one of the senior researchers who participated in the multi-center clinical trials'.
Determining the full subject phrase is essential for establishing grammatical agreement.
2
Isolate the head noun/pronoun of the subject phrase from intervening modifiers.
The true head of the subject is 'Every one', which is a singular indefinite pronoun structure. The prepositional phrase 'of the senior researchers' and relative clause 'who participated in the multi-center clinical trials' are post-modifiers.
Intervening plural nouns inside prepositional phrases or relative clauses do not change the grammatical number of the subject head.
3
Apply the rule of subject-verb concord to select the matching verb form.
The singular subject head 'Every one' requires the singular third-person present tense verb 'is'.
Singular subjects mandate singular verbs regardless of nearby plural nouns.

Key Concept

Subject-Verb Concord with Indefinite Pronouns and Intervening Modifiers
Question 653Question →

Complete the sentence below by supplying the correct form of the verb 'be' that satisfies the rules of subject-verb agreement.

Fill in the blanks below

Not only the school principal but also the guidance counselors present at the town hall meeting last night.
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Answer

The correct verb to fill the blank is 'were'.
Under the rule of proximity concord, when two subjects are connected by correlative conjunctions such as 'not only ... but also', the verb must agree in number with the noun phrase closest to the blank. Since 'the guidance counselors' is plural and the sentence context specifies past tense ('last night'), the plural past tense verb 'were' is grammatically correct.

Step-by-Step Solution

1
Identify the syntactic structure of the subject.
The subject uses the correlative conjunction pair 'Not only ... but also ...' connecting 'the school principal' (singular) and 'the guidance counselors' (plural).
Correlative conjunctions require applying the principle of proximity concord.
2
Apply the rule of proximity concord to select the appropriate verb agreement.
The verb must agree in number with the subject noun phrase closest to it, which is 'the guidance counselors' (plural).
When subjects are joined by 'not only ... but also', the verb agrees with the closer subject element.
3
Select the correct past tense form of the verb 'be' for a plural subject.
The plural past tense verb form required is 'were'.
The temporal marker 'last night' specifies past tense context, making 'were' the grammatically correct choice.

Key Concept

Proximity Concord with Correlative Conjunctions
Estimated Time:1m 0s
Question 654Question →

Read the sentence below carefully and identify the prepositions required to complete the grammatical structure. Which preposition correctly fills the blank space?

Fill in the blanks below

The Vice-Chancellor emphasized that the proposed academic reforms were entirely predicated the recommendations submitted by the Senate committee.
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Answer

on (or upon)
The participle 'predicated' signifies 'established on' or 'based upon', and in standard English grammar it takes only the prepositions 'on' or 'upon'.

Step-by-Step Solution

1
Identify the head word requiring a dependent preposition in the passive construction.
The head adjective/participle is 'predicated'.
In formal English syntax and standard examination contexts, specific verbs and participles require dedicated dependent prepositions to complete their meaning.
2
Select the correct fixed preposition for 'predicated' when meaning 'founded or based'.
The required preposition is 'on' or 'upon'.
The adjective 'predicated' strictly collocates with 'on' or 'upon' to indicate the basis or foundation of an action or theory.

Key Concept

Dependent prepositions following adjectives/participles (predicated on/upon)
Question 655Question →

An aviation safety officer informed the pilot, 'You must inspect the flight controls now before we take off.'

Complete the reported speech sentence below by supplying the correct expressions for the missing portions.

Fill in the blanks below

The aviation safety officer informed the pilot that he inspect the flight controls before they took off.
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Answer

The first blank requires 'had to' to reflect the past tense backshift of the modal auxiliary 'must' expressing obligation. The second blank requires 'then' (or 'at that time') to convert the time adverbial 'now' into reported speech.
When converting a direct command or obligation into reported speech following a past-tense reporting verb ('informed'), the modal auxiliary 'must' changes to 'had to' and the temporal adverb 'now' converts to 'then' or 'at that time'.

Step-by-Step Solution

1
Determine the tense backshift required for the modal auxiliary 'must'.
'must' shifts to 'had to' when converting direct speech to reported speech following a past-tense reporting verb.
When reporting statements in the past tense, modal verbs expressing present obligation shift to their past-equivalent forms.
2
Determine the adverbial transformation required for the temporal adverb 'now'.
'now' shifts to 'then' or 'at that time'.
Adverbs of time referring to the present moment must be adjusted to point to the past moment of utterance when reported.

Key Concept

Modal auxiliary backshift and temporal adverbial transformation in reported speech
Question 656Question →

Complete the following sentence by entering the grammatically correct verb phrase in the blank provided.

Fill in the blanks below

Had the diplomatic envoy verified the credentials earlier, the conflict prevented.
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Answer

would have been
The initial clause 'Had the diplomatic envoy verified...' sets up an inverted third conditional (hypothetical past condition). To complete the sequence of tenses in passive voice, the main clause requires 'would have been' (or 'could have been').

Step-by-Step Solution

1
Identify the conditional structure of the sentence.
The clause 'Had the diplomatic envoy verified...' is an inverted third conditional representing an unfulfilled past condition.
Inverting the subject and auxiliary verb 'had' replaces the conditional conjunction 'if'.
2
Determine the required verb tense and aspect for the main clause.
The main clause requires a perfect conditional passive verb structure ('would have been' or 'could have been').
Third conditional structures require a modal auxiliary + have + past participle in the main clause to express hypothetical past outcomes.

Key Concept

Inverted Third Conditional Tense and Aspect
Question 657Question →

Which auxiliary verbs correctly complete the blanks in the sentence below to satisfy the rules of subject-verb concord?

Fill in the blanks below

The number of foreign envoys who arrived for the bilateral peace summit surpassed all initial expectations.
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Answer

The first blank requires 'have' and the second blank requires 'has'.
In the relative clause, 'who' takes the plural antecedent 'foreign envoys', necessitating the plural auxiliary verb 'have'. In the main clause, the phrase 'The number of...' functions as a singular subject, requiring the singular auxiliary verb 'has'.

Step-by-Step Solution

1
Analyze the subject and verb structure for the relative clause containing the first blank.
The relative pronoun 'who' refers back to the plural noun antecedent 'foreign envoys'.
A relative pronoun takes a verb that agrees in number with its antecedent. Since 'envoys' is plural, the relative clause verb must also be plural ('have').
2
Analyze the head subject and verb structure for the main clause containing the second blank.
The grammatical subject of the main clause is 'The number', which is a singular head noun phrase.
The expression 'The number of' takes a singular verb, unlike 'A number of' which takes a plural verb. Therefore, the main verb must be singular ('has').

Key Concept

Subject-Verb Concord with Relative Pronouns and 'The Number of' Expressions
Question 658Question →

Which of the following options represents the correct passive transformation of the active sentence below?

"The navy admiral ought to have called off the amphibious operation long before the enemy detected the fleet."

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Answer: The amphibious operation ought to have been called off by the navy admiral long before the fleet was detected by the enemy.

Answer

The amphibious operation ought to have been called off by the navy admiral long before the fleet was detected by the enemy.
The correct passive transformation accurately converts the active modal perfect structure 'ought to have called off' into 'ought to have been called off' without omitting the essential particle 'off'. It also correctly converts the subordinate clause 'the enemy detected the fleet' into the passive 'the fleet was detected by the enemy'.

Step-by-Step Solution

1
Identify the primary active verb phrase and object in the main clause.
Verb phrase: 'ought to have called off' (modal perfect phrasal verb); Object: 'the amphibious operation'.
The object of the active sentence must become the subject of the passive sentence.
2
Apply passive transformation rules to the modal perfect phrasal verb phrase.
Active 'ought to have called off' becomes passive 'ought to have been called off'.
Modal perfect passive requires the structure: Modal + to + have + been + past participle + particle.
3
Transform the dependent temporal clause ('before the enemy detected the fleet').
'before the fleet was detected by the enemy'
The simple past active verb 'detected' converts to simple past passive 'was detected'.

Key Concept

Passive Transformation of Modal Perfect Phrasal Verbs
Estimated Time:1m 30s
Question 659Question →

The art curator instructed her assistant, "Do not move these delicate sculptures until the climate control system has been fully repaired." Which of the following options correctly renders this statement in indirect speech?

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Answer: The art curator instructed her assistant not to move those delicate sculptures until the climate control system had been fully repaired.

Answer

The statement is correctly reported as: The art curator instructed her assistant not to move those delicate sculptures until the climate control system had been fully repaired.
The correct transformation properly converts the direct imperative 'Do not move' into 'not to move', changes the demonstrative 'these' to 'those', and backshifts the present perfect verb 'has been' to past perfect 'had been' to agree with the past reporting verb 'instructed'.

Step-by-Step Solution

1
Convert the negative imperative command into indirect speech
The direct command 'Do not move' becomes 'not to move'.
Negative imperatives in direct speech are reported using 'not' followed by the to-infinitive verb.
2
Adjust the demonstrative pronoun according to psychological/spatial distance
'these delicate sculptures' becomes 'those delicate sculptures'.
Demonstratives change from near ('these') to distant ('those') when reported in the past.
3
Backshift the tense of the subordinate clause verb
'has been fully repaired' shifts to 'had been fully repaired'.
Because the reporting verb ('instructed') is in the past tense, present perfect tense must shift to past perfect tense.

Key Concept

Tense backshift, demonstrative pronouns, and reporting imperatives in indirect speech
Question 660Question →

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

'Accompanied by her senior legal advisers, neither of the lead prosecutors _____ present in court when the verdict was delivered.'

Show answer & explanation

Answer: was

Answer

was
The correct option 'was' satisfies subject-verb agreement because the true grammatical head of the subject is the singular indefinite pronoun 'neither'. Intervening prepositional phrases ('of the lead prosecutors') and parenthetical modifiers ('Accompanied by her senior legal advisers') do not affect the singular number of the head subject, requiring the singular past verb form 'was'.

Step-by-Step Solution

1
Identify the syntactic subject of the main clause.
The grammatical subject is the indefinite pronoun 'neither'. The phrase 'of the lead prosecutors' is a prepositional post-modifier.
Prepositional phrases following indefinite pronouns do not change the singular nature of the head subject.
2
Analyze surrounding parenthetical modifiers and past context.
The introductory participial phrase 'Accompanied by her senior legal advisers' is non-restrictive parenthetical material, and 'was delivered' sets a past-tense time frame.
Parenthetical expressions attached with 'accompanied by' do not pluralize the main subject.
3
Select the verb that satisfies singular subject-verb concord and tense consistency.
The singular simple past verb 'was' correctly completes the sentence.
It maintains agreement with singular 'neither' in a past narrative context.

Key Concept

Indefinite Pronoun Concord with Intervening Plural Modifiers
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