问题描述：
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.
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.
问题解答：
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