I would和I had都是I'd，該怎么區(qū)分？

I would

I would+動(dòng)詞原形

I'd see

I'd walk

I'd study

If I were you, I'd rather go.

如果我是你，我就去

If I were rich,I'd travel around the world.

如果我有錢，我就去環(huán)游世界

I had

I had+過(guò)去分詞構(gòu)成過(guò)去完成時(shí)

I'd seen

I'd walked

I'd studied

He'd already left when we arrived.

當(dāng)我們到的時(shí)候，他已經(jīng)走了

I felt absolutely certain that I'd seen her before.

我完全確信自己以前曾見(jiàn)過(guò)她