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问题: 请把这几句话改成主动语态.

这几句是情态动词后的不定式的被动语态.
This can't have been done by a human being.
He may have been given wrong information.
The house must have been broken into at night.
Such people shouldn't have been invited.

解答:

1 A human being can't have done this. (楼上可能是笔误吧?)
2 Someone may have given him the wrong information.
3 Someone must have broken into the house at night.
4 We shouldn't have invited such people.