Pozitive:
You don't like me, do you?
Outside isn't raining, is it?
You didn't eat cake, did you?
You haven't cleaned your room, have you?
He shouldn't be here, should he?
Negative:
It is snowing outside, isn't it?
He did his homework, didn't he?
Snow is white, isn't it?
You do like coffee, don't you?
You are English, aren't you?