来这支视频告诉你·不定式到底是啥

非谓语动词=不当谓语的动词

不定式是最常见的非谓语动词

1、不定式作名词

表达的是一件事

eg:To see you is the plan.=The plan is to see you.

I like to see you.

2、不定式作形容词

eg: The person to meet is Judy.

The book to read is Harry Potter

3、不定时作副词

把目的信息带到了句子里、（主语的目的）

副词是对整个句子的补充

eg:I go to school to learn English.

To see you, I fly across the ocean.