see somebody do 和see somebody doing 比较

9月1日早上9：10--9:14

I saw Tom get into his car and drive away.

用不带to 的不定式：

We saw them go out.

在被动语态后面要加 to :

They were seen to go out.

我只是看到他正在做某事，并没有看见动作的全过程：

I saw him walking along the street. 

有时区别不重要：

I've never seen her dance.   I've never seen her dancing.