Question

Difficulty: Very hardSubject-Verb Agreement

The passage below contains verbs in parentheses. To establish proper subject-verb agreement throughout the passage, what are the correct present-tense forms of the verbs that should replace the blanks?

Answer:Neither the lead researchers studying the geothermal anomalies nor the chief volcanologist supervising the project 【expects】 (expect) that the new data will contradict established models. Indeed, key among the findings that have emerged from the deep-sea expeditions 【is】 (be) the discovery of several previously unknown extremophile species.

Answer

The correct present-tense forms are 'expects' for the first blank and 'is' for the second blank.
For the first blank, the compound subject is joined by 'neither... nor', so the verb must agree with the closer subject, 'the chief volcanologist' (singular), which requires the singular present-tense form 'expects'. For the second blank, the sentence has an inverted structure where the verb precedes the subject. The subject is the singular head noun 'discovery', which requires the singular present-tense verb 'is'.

Step-by-Step Solution

1
Identify the subject of the verb in the first sentence.
The subject is a compound subject joined by the correlative conjunctions 'neither... nor': 'Neither the lead researchers... nor the chief volcanologist...'
When subjects are joined by 'neither... nor', the verb must agree with the subject closest to it.
2
Determine the agreement and form for the first blank.
The closer subject is 'the chief volcanologist', which is singular. Thus, the singular present-tense form 'expects' is required.
Matching the singular subject 'volcanologist' requires the singular form of the verb.
3
Identify the subject of the verb in the second sentence.
The sentence is inverted, meaning the subject follows the verb. The subject is the noun phrase 'the discovery of several previously unknown extremophile species'. The head noun of this phrase is 'discovery' (singular).
Inverted sentences place the verb before the subject, and intervening prepositional phrases do not affect agreement.
4
Determine the agreement and form for the second blank.
The singular subject 'discovery' requires the singular present-tense form of 'be', which is 'is'.
A singular subject must take a singular verb, despite the presence of intervening plural nouns like 'findings' or 'expeditions'.

Key Concept

Subject-Verb Agreement
Estimated Time:1m 30s
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