did与do的区别

did是do的过去式

例句

1、

Any reasonable person would have done exactly as you did.

任何有头脑的人都会完全照你那样去做的。

2、

It was one of the hardest things I ever did.

这是我做过的最难的事情之一。

3、

What time did you get here?

你什么时候到达这儿的