Question Detail

We must have obeyed our teachers.

Our teachers might have obeyed.
Our teachers might have been obeyed.
Our teachers must have been obeyed.
Our teachers must have obeyed.

Answer: Option C

Explanation:

If we have "Subject + Modal Auxiliary verb + have + third verb + object"
then we change it to

Passive subject + Modal Auxiliary verb + have been + third form + by + passive object.

Modal Auxiliary verb are : can, could, shall, will, may, might, should, would, must, ought to etc.

1. He had written a poem.

A poem has written by him.
A poem had written by him.
A poem had been written by him.
A poem has been written by him.

Answer: Option C

Explanation:

Note :- Rule to make active voice of Past Perfect Tense :

Passive subject + had + been + third form of verb + by + passive object

2. Let me do this task.

Let this task be did be me.
Let this task done be me.
Let this task be done be me.
Let this task be do be me.

Answer: Option C

3. The police caught the culprit.

The culprit were caught be the police.
The culprit was caught be the police.
The culprit caught be the police.
The culprit had caught be the police.

Answer: Option B

4. Will nobody help the Sheetal ?

Will the Sheetal not be helped ?
Will the Sheetal not helped ?
Will the Sheetal not be help ?
Will Sheetal not be helped ?

Answer: Option A

5. It is time to prepare for the game trails.

It is time to prepared for the game trails.
It is time to be prepared for the game trails.
It is time for the game trails to prepared.
It is time for the game trails to be prepared.

Answer: Option D