what would you do和what would you have done有什么不同？

what would you do和what would you have done有什么不同？

what would you do ? 陈述句 you would do something

-----would do

表示将来，会，意愿，打算 做什么事，有时候would 是will 的过去式，即过去将来时表示曾经打算、曾经将要干某事

所以这个问句可以翻译为：你会做什么/你将干什么/你打算干什么/你以前打算干什么

what would you have done? 陈述句 you would have done something

-----would have done

是一种虚拟语气，表示对过去事情的假设，本来做什么

If I hadn't play games, I would have finished my homework.

如果我没有玩游戏，我本来已经完成我的作业了。（事实是我没有）

I don't blame you. I would have done the same.

我不怪你，我也会这样做的。

所以这个问句可以翻译为：(如果是你遇上的这事---注：此事已成往事）你会做什么？/(如果--过去--怎么样）你会做什么？