Составить 4 диалога со словами may, mest,can.

1. 
-May I leave?
-Yes, you may, but you must do that in the break time. 
2. 
-Will you go swimming today?
-I must, but I'm not sure I can. 

3. 
- May I ask a question, sir?
- Yes, of course  you can. 

4. 
-You must not copy homework from the other students. 
-But how can we get good grades then???