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. My friends are watching the match.

The match is watched by my friends.
The match had being watched by my friends.
The match is being watched by my friends.
The match has being watched by my friends.

Answer: Option C

2. I am drawing the picture.

The pictures were being drawn by me.
The picture is being drawn by me
The picture was being drawn by me
The picture is being drawing by me
The picture is been drawn by me

Answer: Option B

3. Don't insult the deaf man.

Let the deaf man not be insult.
Let the deaf man not be insulted.
Let the deaf man not insulted.
Let deaf man not be insulted.

Answer: Option B

4. We hate him.

He has hated by us.
He is hated by us.
He was hated by us.
He will hated by us.

Answer: Option B

5. Let him do this work.

This work let done by him.
Let this task done be me.
This work let be done by him.
Let this work be done by him.

Answer: Option D