You didn't do it but it would have been the right thing to d

You didn't do it but it would have been the right thing to do这里的have been,为什么要用have been?
u33
Google测试员1382 1年前 已收到1个回答 举报

开心就好828 幼苗

共回答了18个问题采纳率:94.4% 举报

这是虚拟语气的一种,表示与过去事实完全相反的假设,用句型
would/should/could/might + have +过去分词

1年前

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