would/ should+ had+ done是什么意思啊？

Question

如题所述

Answer 1

would/should + have + 过去分词 这是虚拟语气的一种用法。

would have done ：表示对过去事情的假设，意思是“本来会做”。
比如：
I would have told you all about the boy's story, but you didn't ask me. 我本来会告诉你这个小男孩的故事，但是你没有问我。

should have done: 表示对过去事情的假设，意思是本来能够做某事而没有做。含有指责对方或自责的含意。
比如：
Tom, you are too lazy. The work should have been finished yesterday. 汤姆，你太懒惰了，这项工作本来应该昨天就做完的。

Answer 2

would/ should had done ：表示对过去事情的假设，意思是本来会做（已经发生）