Question tags – Function

Question tags are used at the end of statements to turn the statements into questions. We normally use question tags to check something you think you know or you think is true.
 

Question tags – Form

Use the same auxiliary verb as in the main sentence. If there is no auxiliary verb, use do for present and did for past. And always use a comma before the question tag and a subject pronoun at the end (I, you, he, she, it, we, you they)

If the main sentence is negative, use a positive auxiliary. If the main sentence is positive, use a negative auxiliary.

Aren’t I?

Note when we have an affirmative sentence with I am, the question tag is aren’t I?

Tag questions