Question tags are short questions at the end of a statement. There are several reasons why we might do this. Overall, we use question tags to encourage a response from another person. We use question tags to confirm something that is true or not true. Future speculation is another reason to use this type of grammar. Advanced speakers of English know this grammar well. It is extremely common in spoken English. We can also use question tags to imply an offer. Question tags are formed with an auxiliary or modal verb. Positive statements are followed by a negative tag while negative statements are followed by a positive tag. If your statement is a true question, your intonation rises. If you know the answer or share your opinion, your intonation falls.