Select the word or phrase that makes the sentence grammatically correct.
On Tuesdays, my ________________ stays in the office until midnight.

Question

Quizplus · Accepted Answer

Co-worker is the only word that makes this sentence correct. The verb "stays", which is singular, needs a singular subject.
Co-worker does
This option is not correct. The auxiliary verbs do, does, and did can be followed by the bare infinitive in affirmative sentences to express emphasis but in this sentence, the verb "stays" is not an infinitive.
Many co-workers
This option is not correct. The verb "stays", which is singular, needs a singular subject.
Co-workers did
This option is not correct. The verb "stays" is third-person singular and in the present simple, so it needs a singular subject. Even though the auxiliary verbs do, does, and did can be followed by the bare infinitive in affirmative sentences to express emphasis, the past tense "did" doesn't agree with the present tense "stays".

Select the Word or Phrase That Makes the Sentence Grammatically