Make the sentences (a) interrogative, (b) negative:
1. He can speak English quite well. 2. She can read English books now. 3. They must go home. 4. I must stay there. 5. They may smoke here. 6. We can do it for you. 6. He must hurry. 7. You may leave home now. 8. She must decide what to do.

1. Can he speak English quite well?

He can't speak English quite well.

2. Can she read English books now?

She can't read English books now.

3. Do they must go home?

They mustn't go home.

4. Do I must stay there?

I mustn't stay there.

5. May they smoke here?

They don't may smoke here.

6. Can we do it for you?

We can't do it for you.

7. Must he hurry?

He mustn't hurry.

8. may you leave home now?

You don't may leave home now.

9. Must she decide what to do?

She mustn't decide what to do.