saw sb doing sth是什么时态

saw sb doing sth是过去进行时，看见某人正在做某事。

例句

I saw him standing in the yard.

我看见他站在院子里。

We saw lights in the distance.

我们看到了远处的点点灯光。

I saw him sometime last summer.

我去年夏天什么时候见过他。

I saw a girl riding a horse.

我看见一个骑着马的女孩。

I saw her pedalling along the towpath.

我看见她在纤道上骑自行车。

I saw her sitting at a window table, bathed in sunlight.

我看见她坐在临窗的桌旁，沐浴在阳光中。