the room is in a terrible mess ________(一定没打扫过)答案是cant have been cleaned 但是我觉得应该用 has

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theroomisinaterriblemess________(一定没打扫过)答案是canthavebeencleaned但是我觉得应该用hastheroomisinaterriblemess___

the room is in a terrible mess ________(一定没打扫过)答案是cant have been cleaned 但是我觉得应该用 has
the room is in a terrible mess ________(一定没打扫过)
答案是cant have been cleaned 但是我觉得应该用 has

the room is in a terrible mess ________(一定没打扫过)答案是cant have been cleaned 但是我觉得应该用 has
用 have.can't 后面接原形.

can't have done表示的是一种推测,是固定结构,不涉及人称的变化