being done,have been done和having done怎么分辨
人气：497 ℃ 时间：2019-09-09 17:32:52
解答
being done 被动式的进行时——表被动和正在进行
have been done 现在完成时的被动式——表被动和现在
having done 现在完成进行时 ——表主动和正在进行
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