Why do you think so?

你为什么这么认为？

Yes, I think so too.

是的，我也这么认为。

She did not think so.

她不这么认为。

On the chair, I think.

我想在椅子上。

Think of games to play.

想一些游戏来玩。

I don't think we agree.

我认为我们不同意。

I think it was a snake.

我觉得那是一条蛇。

I think it is difficult.

我觉得它很难。

I think about you often.

我经常想你。

I think, therefore I am.

我思故我在。