▲英语可以说 see sb doing sth，表示看见某人正在做某事。如：

I saw a girl riding a horse. 我看见一个骑马的女孩。

I saw him at the bar ordering a beer. 我看见他在酒吧点啤酒。

I saw a man making his way towards me. 我看到一名男子向我走来。

We saw three birds circling very high up. 我们看到3只鸟在高空盘旋。

▲但英语一般不说 see sb having doen sth。若要表示“看见某人已经做了某事”，可用 see sb do sth——这里用动词原形，表示动作的全过程，而既然看到了“动作的全过程”，则说明动作已经发生了。如：

I saw her push the boulder down on you. 我看见她将巨石推下砸向你。

I saw them walk away and felt absolutely desolated. 我看到他们走开了，感到万分悲凉。

I saw him take off his anorak and sling it into the back seat. 我看见他把带帽防寒服脱下来扔在了后面的座位上。

I saw the car drive past, but didn’t recognize the woman behind the wheel. 我看见汽车开过去了，却没有认出开车的女子。

Several eyewitnesses testified that they saw the officers hit Miller in the face. 几位目击证人证明他们看见那几个警官打了米勒的脸。