1.动词不定式作定语。
不定式常可用于修饰人，也可以用来修饰物，或跟在不定式后作定语
May is the first student to arrive. 阿美是第一个到的'学生。
I have a lot of things to do today. 今天我有很多事情要做。
Would you like something to drink? 你想喝点什么?
It's time to go to bed. 该睡觉了。
2.动词不定式作状语。
不定式作状语的情况很多，主要有be+形容词+不定式
She was eager to see her friends. 她急于见她的朋友们。
I am afraid to tell her. 我很怕告诉她。
I am not ready to go back. 我还不准备回去。
3.动词不定式作表语。
不定式位于系动词如be之后用来说明主语的身份、特征、属性或状态
Her ambition was to be a star. 她的志向是当明星。
My task is to take care of my little brother. 我的任务是照顾弟弟。
学识谷
