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    • 不是must have been done吗？

    不是must have been done吗？I must have been dreaming. 不是must have been done吗

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    推荐答案   2018-03-20
    两个都对，have been doing 是现在完成进行时
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    第1个回答  2018-03-20
    must have been done 主语是被动的....主语已经被做好了
    I must have been dreaming.主语是主动的，主语处于***的状态.....我应该在做梦
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