1. Look at those clouds in the sky! It may… rain.
2. She could… read when she was five.
3. Students …must always be in time for classes.
4. Home plants must… be watered regularly.
5. The people of the Earth…should be more careful with nature.
6. We may… write a grammar test on Friday.
7. I won’t be able… to come, I’m afraid. Too much work to do for tonight.
8. Mom! Why no? Yesterday you said I could… go, and today you say I …can not!
9. This car can… not be fixed. We will …have to buy a new one.
10. Hurry up! It’s already 7 o’clock. Dad …must be already at home.
1. He must be busy.
2. At four o'clock I'll have to leave.
3. You may go.
4. My friend's neighbour can not swim.
5. You should walk on the left side of the highway.
6. You must protect the client base of your company.
7. I won't be able to help you.
8. I may be back late.
9. I am to meet the delegates of the conference on January 22 at 9 am.
10. I could not do anything for her.