The sentence to the listener, to ask for an agreement and to express a surprise. make the question tag is depend on the kind of the sentence or the auxilary of sentence. When the sentence is positive then the question tag is negative and when the sentence is negative then the question tag is positive. Examples:You are tired, aren't you?
He is handsome, isn't he ?
They are playing well, aren't they?
When she was junior high school, she was good in Badminton, wasn't she?
She broke the pot, didn't she?
She can't climb the tree, can she?
You didn't sleep last night, did you ?
She doesn't know the answer, does she?​