Which of the following sentences contains an auxiliary verb?

a) She plays basketball every day.
b) He will attend the party tonight.
c) They walked to the store yesterday.
Answer: b) “will” is the auxiliary verb because it helps to form the future tense.

Which of the following auxiliary verbs is used to form the passive voice?

a) do
b) have
c) be
Answer: c) “be” is used to form the passive voice, as in “The cake was baked by my mom.”

In which of the following sentences is the auxiliary verb used correctly?

a) He do not like coffee.
b) I have went to that restaurant before.
c) She is singing a song.
Answer: c) “is” is used correctly in the sentence, as it helps to form the present continuous tense.

Which of the following sentences contains a modal auxiliary verb?

a) They have gone to the beach.
b) He should call his mom.
c) She is reading a book.
Answer: b) “should” is the modal auxiliary verb in the sentence.

Which of the following auxiliary verbs is used to form the perfect tense?

a) do
b) have
c) be
Answer: b) “have” is used to form the perfect tense, as in “I have eaten breakfast.”

In which of the following sentences is the auxiliary verb used incorrectly?

a) We can to go to the park tomorrow.
b) She has been studying all day.
c) He am playing basketball right now.
Answer: a) “can to go” is incorrect. The correct sentence is “We can go to the park tomorrow.”

Which of the following modal auxiliary verbs expresses a possibility?

a) must
b) may
c) could
Answer: b) “may” expresses a possibility, as in “I may go to the store later.”

Which of the following auxiliary verbs is used to form the conditional tense?

a) do
b) have
c) would
Answer: c) “would” is used to form the conditional tense, as in “If I had more money, I would buy a
car.”

In which of the following sentences is the auxiliary verb used correctly?

a) She am going to the store.
b) They will can come to the party.
c) He has written a book.
Answer: c) “has” is used correctly in the sentence, as it helps to form the present perfect tense.

Which of the following modal auxiliary verbs expresses an obligation?

a) can
b) should
c) might
Answer: b) “should” expresses an obligation, as in “You should study for the exam.”