不定式作宾补,修饰宾语,表示的动作一般是将来发生的,如:
I want him to help me tomorrow.
过去分词作宾补,修饰宾语,表示的动作和宾语之间是被动关系,如
I found my litter brother beaten
现在分词作宾补,表示的动作和宾语之间是主动关系,如
When I passed by,I saw him playing computer games.