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TOEFL Structure Part 15: Missing Auxiliary Verb-Active


Problem 15 Missing Auxiliary Verb-Active
Remember that some main verbs require auxiliary verbs


BE
-ing

Mom
is
watering
her plants


HAVE
participle

Mom
has
watered
her plants


MODAL
verb word

Mom
should
water
her plants

Avoid using -ing forms without BE, participles without HAVE, and verb words without modats when -ing, a participle, or a verb word function as a main verb.

INCORRECT : The party is a surprise, but all of her friends coming.
CORRECT :
The party is a surprise, but all of her friends are coming.
INCORRECT :She read it to you later tonight
CORRECT :
She will read it to you later tonight.

INCORRECT :
The sun shining when we left this morning.
CORRECT :
The sun was shining, when we left this morning.

INCORRECT :
We gone there before.
CORRECT :
We have pone there before.

INCORRECT :
I can't talk with you right now because the doorbell ringing.
CORRECT :
I can't talk with you right now because the doorbell is ringing.

Exercises
Part A: Choose the correct answer.

The giraffe survives in part because it _________ the vegetation in the high branches of trees where other animals have not grazed.
(A) to reach
(B) can reach
(C) reaching
(D) reach

Part B: Choose the incorrect word or phrase and correct it.

according to some scientists, the earth losing its outer atmosphere because of pollutants.
(A) (B) (C) (D)
Labels: Structure TOEFL

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