一英语反意疑问句问题?They must have counted de votes wrong,______?I'm sorry,but there was no mistake.请问填什么,

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一英语反意疑问句问题?They must have counted de votes wrong,______?I'm sorry,but there was no mistake.请问填什么,
一英语反意疑问句问题?
They must have counted de votes wrong,______?
I'm sorry,but there was no mistake.
请问填什么,

一英语反意疑问句问题?They must have counted de votes wrong,______?I'm sorry,but there was no mistake.请问填什么,
Haven't they.
前肯后否.

haven't they

Haven't they.

have they

我认为是didn't they ?
如果用mustn't they ?mustn't they = mustn't they have counted the votes wrong,因为must表示逻辑推断不用于疑问句,所以不对。

我也举得应该是填didn't they,They must have counted de votes wrong,这里的must have done,这是个固定搭配,表示对过去某事的肯定猜测,因为动作发生在过去,所以用didn't+主语。