1.用在一些及物动词后,如 want to do fail to do decide to do manage to do plan to do
2.用在一些疑问词后可做主语,宾语,表语等.When to start is not decided.
3 用在介词but后做介词宾语,如 I did nothing but watch TV yesterday./ We had no choice but to wait here.
4.用在动词后也可在句首做状语.如 He came to see me./ To/In order to catch the early bus ,he got up early.
5.用在系动词后做表语.如My dream is to be a scientist.
6.用在句首做主语,To be a singer is my dream.
7.用在名词或代词后做后置定语,The best time to come to Beijing is autume.
8.用在宾语后补充宾语做了什么,叫宾语补语
Our teacher tells us to read more in the morning .谢谢诶