帮忙分析一下动词不定式在句中充当的成分

题目

帮忙分析一下动词不定式在句中充当的成分
1.Does this disability make it difficult for them to do some things?
2.I had to stop and rest halfway up the stairs.
3.I used to climb trees.
4.Just accept them and give them encouragement to live as rich and full a life as you do.

答案

1 宾补 2 have/had to do sth 只是做动词的一部分 3 used to do sth过去常常做某事,也是动词的一部分.4 目的状语