初三英语动词知识点：动词不定式的形式

初三英语动词知识点动词不定式的形式

　　1.作主语。 如

　　To learn English is very important.

　　但实际上不定式作主语常用 it来作形式主语，而将不定式移至谓语动词后作真正的主语。

　　如上句可表达为

　　It's very important to learn English.

　　2.作表语。 如

　　My idea is to ring him up at once.

　　3.作宾语。 如

　　I have decided to go to Binjiang Primary School.

　　4.作宾语补足语。

　　a. ask, ant, teach, tell, kno, ould like, allo等动词后面接动词不定式作宾语补足语。

　　如 The policen asked him to get off the bus.

　　b. hear, see, look at, feel, atch, notice, listen to等动词后接不带to的动词不定式作宾语补足语。

　　如 We often see Miss Li clean the classroom.

　　c. let, make, have这些使役动词后接不带to的动词不定式作宾语补足语。但在被动语态中这些不带to的都须带上to。

　　如 In those days the bosses often made the orkers ork day and night.

　　d.动词help接动词不定式作宾语补足语，可带to也可不带to。

　　如 Can you help (to) carry the heavy bag?

　　5.作定语。

　　a.与被修饰词有动宾关系。如I have sothing important to tell you.但如果不定式动词为不及物动词，后面的介词千万不要省略。

　　如 Maybe they have three rooms to live in.

　　b.与被修饰词有主谓关系。

　　如 Mr Liang is alays the first to e and the last to leave.