Read the theory. Then, choose the correct item. Write in you notebook.

1 A: Can't/May I see your ticket, sir?
B: Yes, you may/could.
2 A: Can/Couldn't I take photos in the caves, Mum?
B: No, I'm afraid you can't/may.
3 A: Could/Can I check your luggage, sir?
B: No, you may not/couldn't.
4 A: Dad, can/may not we go swimming today?
B: Yes, we may/can.​