be to have done和 would have done有什么区别在时态上

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推荐答案 2019-02-21

前者是陈述语气说的是真实情况，后者是虚拟语气，说的是与实际情况相反的情况。追问

但是它俩的意思都表示:本计划做但是没做😭😭这应该怎么解释

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