Question tags are short questions that can follow sentences, especially in spoken English. We use question tags to ask if something is true or to ask people to agree with us.
FORM
Positive statement – question tag negative
Negative statement – question tag positive
EXAMPLES:
With the verb to be
You are a teacher, aren’t you?
She is beautiful, isn’t she?
NB the short form with I am is aren’t I
I’m late, aren’t I?