Question Detail

Rahul mush have done that task.

That task must had been done by Rahul.
That task must have been done by Rahul.
That task must have done by Rahul.
That task must have been did by Rahul.

Answer: Option B

1. 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

2. He does not fly kites.

Kites are not flows by him .
Kites does not flows by him .
Kites were not flows by him .
Kites was not flows by him .
Kites is not flows by him .

Answer: Option A

3. Who wrote this book ?

By whom is this book written ?
By whom was this book written ?
By who was this book written ?
By whom were this book written ?

Answer: Option B

4. 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.

5. Did he buy a car ?

Was a car bought by him.
Did car bought by him.
Did a car bought by him.
Were a car bought by him.

Answer: Option A