Tag questions are two word tags added to the end of a statement to make a question. Tag questions give the other person a chance to reply to something that has been said. Although we can use different words to make tag questions, they all mean the same thing: “Do you agree?” or “Am I right?”
We can make tag questions with both positive and negative statements. Positive statements will always have negative question tags, and negative statements will always have positive question tags.
To make a tag for a positive statement, use the negative form of the first auxiliary verb + subject (or its pronoun), as in, “Jane has already seen the movie, hasn’t she?” or, “You are studying tonight, aren’t you?”
To make a tag for a negative statement, use the positive form of the auxiliary verb + subject (or pronoun), as in, “We didn’t eat very much, did we?” or, “He isn’t interested, is he?”