A tag question is a special construction in English. It is a statement followed by a mini-question. The whole sentence is a "tag question", and the mini-question at the end is called a "question tag".
A "tag" is something small that we add to something larger. For example, the little piece of cloth added to a shirt showing size or washing instructions is a tag.
We use tag questions at the end of statements to ask for confirmation. They mean something like: "Am I right?" or "Do you agree?" They are very common in English.
The basic structure is:
Notice that the question tag repeats the auxiliary verb (or main verb when be) from the statement and changes it to negative or positive.
A question tag is the "mini-question" at the end. A tag question is the whole sentence.
We will now look at positive statement tag questions.