A question tag or tag question is a grammatical structure in which a declarative statement or an imperative is turned into a question by adding an interrogative fragment (the "tag"). For example, in the sentence "You're John, aren't you?

Tag Question
Tag Question
The functions of tag questions
English tag questions in universal grammar
The Tag Question in British English: It's Different, I'N'It?
Negative Transportation and Tag Questions
Tag questions and common ground effects in the perception of verbal irony ☆
The Question of Tag Questions in Women's Speech: They Don't Really Use More of Them, Do They?
Declarative constant polarity tag questions: A data-driven analysis of their form, meaning and attitudinal uses
A First Look at the Semantics and Pragmatics of Negative Questions and Tag Questions