Глаголы ,пять предложений положительных и отрицательных с can и mast

1. He can help me.

Can he help me?

He can\'t help me.

2. They must be at school tomorrow.

Must they be at school tomorrow?

They mustn\'t be at school tomorrow.

3. We can do our homework in time.

Can we do our homework in time?

We can\'t do our homework in time.

4. You must tell the truth.

Must you tell the truth?

You mustn\'t tell the truth.

5. She can read Russian.

Can she read Russian?

She can\'t read Russian.