Negative questions: form and everyday use
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查看解释
A standard question asks neutrally: 'Did you lock the door?' You do not indicate what answer you expect. A negative question suggests an assumption: 'Didn't you lock the door?' Here, you probably believed the door was locked and are surprised to find it open. The listener can still answer yes or no, but the question reveals your perspective.
Aren't you coming to lunch with us today?