MEMINTA IZIN: MAY I, COULD I, CAN I

POLITE QUESTION	POSSIBLE ANSWERS	People use may I, could I,* and can I to ask polite questions. The questions ask for someone’s permission. (a), (b), and (c) have basically the same meaning. Note: can I is less formal than may I and could I.
(a)    May I please borrow your pen? (b)   Could I please borrow you pen? (c)    Can I please borrow your pen? .	Yes. Yes. Of course. Yes. Certainly. Of course. Certainly. Sure. (informal) Okay. (informal) Uh-huh. (meaning “yes”)
		Please can come at the end of the question: May I borrow your pen, please? Please can be omitted from the question: May I borrow your pen?