Question

Complete the sentence with the correct form of the verb given in the brackets:
I was teaching English when she________the classroom. (enter)
A) entered
B) had entered
C) will have entered
D) has entered

Answer 1

Hint: A verb is used to convey action, in the sentence. It has three main forms with respect to time, namely - Past, Present, and Future.

Complete step-by-step answer:

From the hint given to us, we know that a verb is used to convey an action, in the sentence. It has three main forms with respect to time, namely - Past, Present and Future. We observe that in the first clause of the given sentence, the modal verb,’was’ has been used. It is an indicator of the past tense. The first clause of the given sentence uses the verb of past continuous form We infer that the second verb or action took place while the first verb was in progression. Hence, we can conclude that the second verb has to be of simple past tense. A verb is suffixed with ‘-ed’ in order to change it to a simple past tense.
We observe that option A, entered is in accordance with our inference. It also fits the sentence correctly. Hence, option A is the correct answer.
Had entered is past perfect form of enter. Past perfect tense is used for actions that took place in past to past. It does not fit the context of the given sentence. Hence, option B is not the correct answer.
Will have entered is future perfect form of enter. Future perfect tense is used to indicate something that is certain to happen in the future. It does not fit the context of the given sentence. Hence, option C is not the correct answer.
Has entered is the present perfect form of enter. It is used to indicate an event in the past that has present moment consequences. It does not fit the context of the given sentence. Hence, option D is not the correct answer.

Note: Perfect forms of verbs have auxiliary verbs - has/had/have, attached to the main verb.