Question

would have done和 should have done的区别是什么?意思分别是什么

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 have done是过去将来完成时，是一种时态。would是will的过去式。
而should have done的should，有实意，是应该的意思。表示应该做某事却没有做。

Answer 3

should have done 表示 应该做而没做
would have done 是过去完成时

Answer 4

都是虚拟语气，should have done比would have done语气强烈一点