1. If a waiter approaches the customer after he has finished eating:
Waiter: Can I take your plate?
Customer: Yes, you can take it.
Is it correct to use "take away'?
Yes — or just say 'Yes (you can)'.
2. If a customer hasn't finished eating
and the waiter wants to take away his plate:
Customer: Waiter, please don't take away my plate.
Is it correct to leave out "away'?
Yes.
3. If we have finished eating, I ask our domestic help to take away our plates. Which of the following sentence is correct?
I. Please take the plates.

II. Please take away the plates.
