I saw him into the small room .请问用什么形式?为什么?see.,do\doing

I saw him into the small room .请问用什么形式?为什么?see.,do\doing
I saw him into the small room .请问用什么形式?为什么?
see.,do\doing

I saw him into the small room .请问用什么形式?为什么?see.,do\doing
后面加do,是看见了做一件事的全过程.加doing,是看见正在做某事,已经开始,但未结束.