What are question tags?
Question tags are short questions added at the end of a statement to confirm information or seek agreement. They are common in spoken English.
1) How do question tags work?
A question tag is made of an auxiliary (helping) verb and a subject pronoun. The tag must match the tense and auxiliary verb of the main sentence.
• If the sentence is positive, the question tag is negative: You are coming, aren’t you?
• If the sentence is negative, the question tag is positive: She doesn’t like coffee, does she?
2) Key Rules
• Use do /does / did if there is no auxiliary in the main sentence: He works hard, doesn’t he?
• With modal verbs ( can, will, should, etc. ), repeat the modal: She can swim, can’t she?
• With I am, use aren’t I (not "amn’t I"): I’m your friend, aren’t I?