should have done和 would have done是什么意思

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should have done和 would have done是什么意思

should have done和 would have done是什么意思
should have done和 would have done是什么意思

should have done和 would have done是什么意思
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.