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Difficulty: EasySubject-Verb Agreement (Concord)

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

Answer:The lead scientist, together with her assistants, 【is】 conducting the final trial of the new vaccine tomorrow.

Answer

is
The correct verb is 'is' because the grammatical subject of the sentence is the singular noun phrase 'The lead scientist'. Parenthetical additions introduced by 'together with' do not make a singular subject plural.

Step-by-Step Solution

1
Identify the grammatical subject of the sentence.
The core subject is 'The lead scientist', which is singular.
Intervening prepositional phrases introduced by expression markers like 'together with', 'as well as', or 'alongside' do not alter the grammatical number of the main subject.
2
Select the verb form that agrees with the singular subject in the present continuous tense.
The singular auxiliary verb 'is' agrees with 'The lead scientist'.
Singular subjects demand singular verbs regardless of any plural nouns occurring within parenthetical phrases.

Key Concept

Subject-Verb Agreement with Parenthetical Expressions
Estimated Time:45s
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Topics

Subject-Verb Agreement (Concord)

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