What Are Question Tags Used For?
Question tags are the small questions that come at the end of sentences in speech or in informal writing. They are normally used for confirmation of what has just been said. If we ask for confirmation we use falling intonation, if we are not sure, we use rising intonation.
Negative tags come after affirmative sentences and non-negative tags after negative sentences. The question tag for “am I” is “aren’t I”.
Imperatives can be also followed by question tags “will you”, “would you”, “can you”, “could you”, to tell, ask or invite people to do things.