Question tags are short questions at the end of statements to confirm or check information. If the statement is positive, the tag is negative. If the statement is negative, the tag is positive.
Quick tip: Question tags: Positive statement → negative tag. Negative statement → positive tag. Use same auxiliary/modal. I'm right, aren't I? (special: am → aren't)
Form: Statement + tag
Positive statement → negative tag. Negative statement → positive tag. Use the same auxiliary/modal as the statement, or do/does/did if no auxiliary.