1. Katy may be upset. I can't really tell if he is annoyed or tired.
2. Jack may have been upset. I couldn't really tell if he was annoyed or tired.
3. Alice may get upset if you don't tell him the truth.
4.You may leave the table when you finish your dinner.
5.May I make a phone call?
6. It's cold in the street. It might snow this eveningю
7. You may not use this computer.
8. The parcel may be delivered next week.
9. John might not help us.
10. Alice is going to Russia in September