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Form
positive statement ->question tag negative - You are Tom, aren't you?
negative statement->question tag positive - He isn't Joe, is he?
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Examples
with auxiliaries
You've got a car, haven't you?
without auxiliaries (use: don't, doesn't, didn't)
They play football on Sundays, don't they?
She plays football on Sundays, doesn't she?
They played football on Sundays, didn't they?
Questions tags are used to keep a conversation going. You can agree or refuse to a sentence with a question tag.
You go to school, don't you?
You agree. You refuse.
Yes, I do. No, I don't.
You aren't from Germany, are you?
You agree. You refuse.
No, I'm not. Yes, I am.
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Questions tags - Special
Although the negative word not is not in the sentence, the sentence can be negative. Then we use the "positive" question tag.
He never goes out with his dog, does he?
have is a main verb in the sentence -> two possibilities
We have a car, _____?
We have a car, haven't we? We have a car, don't we?
mostly British English mostly American English
We use will with the imperative (Simple Present).
Open the window, will you? Don't open you books, will you?
We use shall after Let's.
Let's take the next bus, shall we?
Auxiliary must
We must be at home at 8 pm, mustn't we?
Yes, we must. No, we needn't.