tag question
From Longman Dictionary of Contemporary Englishtag questionˈtag ˌquestion noun [countable] technical a question that is formed by adding a phrase such as ‘can’t we?’, ‘wouldn’t he?’, or ‘is it?’ to a sentenceExamples from the Corpustag question• The tag question thus contains, in part, a repetition of some of the information found in the main sentence.