Question Detail

He Stole my book.

My book was stolen by him.
My book was been stolen by him.
My book were stolen by him.
My book are stolen by him.
My book is stolen by him.

Answer: Option A

1. Biney kill the snake.

The snake is being killed by biney.
The snake is killed by biney.
snake is killed by biney.
The snake was killed by biney.
The snake are killed by biney.

Answer: Option B

2. Sit down.

You are requested to sit down.
You are ordered to site down.
You are told to sit down.
No change.

Answer: Option B

3. 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

4. Open the window.

Let the window be opened.
Let the window will be opened.
Let the window was opened.
Let the window is opened.
Let the window is been opened.

Answer: Option A

5. 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.