I have parents to take care of.这里的不定式是充当什么成分,做什么用?我的理解是充当形容词,修饰名词parents,但问题是上面这个句子也可以写成I have to ta

题目

I have parents to take care of.这里的不定式是充当什么成分,做什么用?我的理解是充当形容词,修饰名词parents,但问题是上面这个句子也可以写成I have to take care of my parents.这里的不定式是动词啊,这是怎么回事?难道这两个句子不可以这样代换?

答案

I have parents to take care of.不定式做后置定语,我有(需要照顾的)父母;
have to do sth.是固定搭配,不是不定式,have to=must