What is a tag Questions?

A tag question is a question we can add to the end of a statement.

The basic rules for forming the two-word tag questions are as follows:

* the subject in the statement matches the subject in the tag
* the auxiliary verb or verb to be in the statement matches the verb used in the tag
* if the statement is positive, the tag is usually negative and vice versa


as it shown:

You've posted my letters, haven't you?

You won't forget to check my emails, will you?

You're sad that I'm going, aren't you?

You aren't going to cry when I leave, are you?


When present and past simple tenses appear in positive statements, normally no auxiliary verb is used, but we use the auxiliaries does, do or did in the tag. In negative statements in the present or past simple, the auxiliaries doesn't, don't or didn't are, of course, already present. Compare the following:

You play tennis on Thursdays usually, don't you?

And Jack plays with you, doesn't he?

You didn't play last Thursday, did you?
When we use the there is structure, there is reflected in the tag:

There's nothing wrong, is there?

There weren't any problems when you talked to Jack, were there?