English for Today by Ganiu Abisoye Bamgbose (Dr GAB)
TAG QUESTION
RULE 4:
The verbs, “has”, “have”, and “had” are used to form the tag when they precede another verb but they attract any of “does”, “do” and “did”, respectively when they serve as the only verb in a sentence.
Examples
He has gone, hasn’t he?
He has money, doesn’t he?
I have never come here, have I?
I have a story, don’t I?
He had graduated before he travelled, hadn’t he?
He had your consent, didn’t he?
GAB
