Study these examples:

Have you? and wasn't it? are question tags (= mini-questions that we often put on the end of a sentence in spoken English). In question tags, we use an auxiliary verb (have/was/will etc.).
We use
do/
does/
did for the present and past simple (see Unit 51):
- 'Karen plays the piano, doesn't she?' 'Well, yes, but not very well.'
- 'You didn't lock the door, did you?' 'No, I forgot.'
Normally we use a
negative question tag after a
positive sentence:
positive sentence + | negative tag |
Kate will be here soon, | won't she? |
There was a lot of traffic, | wasn't there? |
Joe should pass the exam, | shouldn't he? |
... and a
positive question tag after a
negative sentence:
negative sentence + | positive tag |
Kate won't be late, | will she? |
They don't like us, | do they? |
You haven't eaten yet, | have you? |
Notice the meaning of
yes and
no in answer to a negative sentence:
- You re not going out today, are you?
Yes. (= Yes, I am going out)
No. (= No, I am not going out)
The meaning of a question tag depends on how you say it. If your voice goes
down, you are not really asking a question; you are only inviting the listener to agree with you:
- 'It's a nice day, isn't it?' 'Yes, beautiful.'
- 'Paul doesn't look well today, does he?' 'No, he looks very tired.'
- 'Lisa's very funny. She's got a great sense of humour, hasn't she?' 'Yes, she has.'
But if the voice goes
up, it is a real question:
- 'You haven't seen Lisa today, have you?' 'No, I haven't.'
(= Have you by chance seen Lisa today?)
You can use a
negative sentence +
positive tag to ask for things or information, or to ask somebody to do something. The voice goes
up at the end of the tag in sentences like these:
- 'You haven't got a pen, have you?' 'Yes, here you are.'
- 'You couldn't do me a favour, could you?' 'It depends what it is.'
- 'You don't know where Karen is, do you?' 'Sorry, I have no idea.'
After
Let's ... , the question tag is
shall we:
- Let's go for a walk, shall we? (the voice goes up)
After
Don't ... , the question tag is
will you:
- Don't be late, will you? (the voice goes down)
After
I'm ... , the negative question tag is
aren't I (= am I not):
- I'm right, aren't I?' 'Yes, you are.'