A catch/find:
I caught them stealing my apples.
我撞见他们正在偷我的苹果。(我发现他们正在干这件事。)
If she catches you reading her diary,shell be furious.
假如她撞见你正在偷窥她的日记,她必然会发火的。
这一动词后由目前分词表示的动作一直使主语感到不愉快。假如与find连用就没不愉快的感觉:
I found him standing1 at the door.
我发现他正站在门口。等于:
I saw him standing/He was standing at the door when I arrived.
我看见他正站在门口/我到的时候他正站在门口。
与find连用时,宾语可以是无生命的东西:
He found a tree lying across the road.
他发现一棵树横倒在马路上。
B leave可与目前分词连用:
I left him talking to Bob.等于:
He was talking to Bob when I left.
我走时他正在和鲍勃说话呢。