Expressar permissão / Expressing permission:
- Can/May I open the window, please?
- – Yes, of course you can/may or
- - No, I’m sorry, you can’t/may not.
- - You wanted to borrow my printer. OK, you can/may.
- Could I look at your map, please?
- – Yes, you can/may (could) or
- - I’m sorry, but you can’t (couldn’t) park here.