This document discusses question tags, which are short questions added to the end of statements to check if information is correct. It notes that question tags use either a negative or positive form depending on whether the statement is negative or positive. The question tag consists of an auxiliary verb and a pronoun referring to the subject. Some common verbs like "be" and "have" form question tags differently. When answering question tags, short responses like "yes" or "no" are often used. Intonation can also indicate whether the speaker is sure or unsure of the answer. In general, question tags are used to check understanding of information.