You didn't do it but it would have been the right thing to do这里的h_英语解答

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

人气：416 ℃　时间：2020-01-28 00:17:20

解答

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