Tag questions are short questions added to the end of a statement to check information or confirm something. They’re common in everyday conversation and often used to invite agreement.
They follow this basic rule:
Tag questions are formed with an auxiliary verb (be, do, have, will, etc.) and a pronoun that matches the subject. If the main sentence has no auxiliary verb, we use do/does/did.
With “I am,” the tag is usually aren’t I (not “amn't I”):
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