The document discusses question tags, which are used in English to confirm information stated in a sentence. Question tags are added to the end of statements and will be the opposite polarity (positive vs. negative) of the original statement. Some common question tags are "isn't she?", "won't they?", and "didn't you?". The document provides examples of question tags used with statements containing verbs like "be", auxiliary verbs, modal verbs, imperatives, and statements with "don't", "doesn't", "didn't". It also includes an exercise for learners to practice completing statements with the appropriate question tags.