动词不定式分别在这些句子中充当什么成分?为什么?

题目

动词不定式分别在这些句子中充当什么成分?为什么?
To get on well with the classmates is important for me.
Who wants to have another try?
Dad went to the hospital to see his friend.

答案

To get on well with the classmates is important for me.动词不定式作主语,谓语动词是is.Who wants to have another try?这里动词不定式作want的宾语.Dad went to the hospital to see his friend?动词不定式作目...