变反意疑问句You must be joking,_____?

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变反意疑问句You must be joking,_____?

变反意疑问句You must be joking,_____?
变反意疑问句You must be joking,_____?

变反意疑问句You must be joking,_____?
aren't you or ain't you(后面这个是比较口语化的.)

反意疑问句部分与must后面的动词呼应 You must be joking, aren’t you? —Don’t worry. Let us do it for you , _? A. will you B.

aren't you? you must be joking ,此处must 表示推测,不能用mustn't (禁止)来表示反义疑问句哦,~~当然也不能用might not !

You must be joking ,aren't you ? must 在这里表推测,本句是进行时,所以用are,主句是肯定式,所以后边用否定。
再如,It must have rained last night ,didn't it ?

aren't you 主句用进行时,从句用are.再加上前肯后否,所以用aren't