动词不定式

　　1、作主语

　　To learn a foreign language is not easy.

　　It is not easy to learn a foreign language.

　　2、作宾语

　　They began to read.

　　3、作宾语补足语

　　Jim asked me to help him with his lessons.

　　We often heard her sing.

　　4、作定语

　　I have an important meeting to attend.

　　5、作状语

　　She went to see her grandma yesterday.

　　6、用在how, when, where, what, which等之后

　　I don’t know how to use a computer.

　　Do you know when to start?

　　He didn’t know what to do next.