Question

Complete the sentence using the correct form of the verb:
The window was open and a bird ___________ into the room. (fly)
a. Flew
b. Is flying
c. Will fly
d. Has flown

Answer 1

Hint: The sentence is talking about an action that took place at a specific time in the past. It is in the form of simple past tense. So, the verb used has to be in that format.

Complete answer:
Simple past tense also known as past simple or past indefinite is a verb tense used to show that an action has been completed somewhere in the past at a specific time. We use this tense to mostly talk about habits and generalizations that we have formed.
We can form a simple past tense using ‘verb + ed’, if it is a question then we use ‘did’ and if it is a negative sentence we use ‘did not’.
Since we have to use the verb – fly, its different forms in different sentences are as follows – fly (base form), flew (past simple), flown (past participle), flies (3rd person singular) and flying (present participle).
So, the above discussion implies that the correct word to use would be ‘flew’ as we are talking about something that happened in the past. And the simple past (because the action is completed independent of other events) tense of fly is – flew.
Therefore, the correct option is option – a.
b) Is flying indicates that the action is happening in front of them at that time only.
c) Will fly is the future tense.
d) Has flown is the past participle form of fly.

Note: Be familiar with the tense of the sentence and the rules that are associated with tense and changing words from their base form to some other tense form.