must have done和must have been doing的区别

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推荐答案 2015-04-29

must have done和must have been doing的区别：

您好。两者都是表示肯定的推测。

must have done：是说你肯定做了某事。
must have been doing：译为肯定当时正在做某事，只有意思的区别。

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