动词不定式可作主语,宾语,表语,定语,状语,补语.具体如下:
1.作主语
eg:To clean the classroom is our task this afternoon.
To finish the work in such a short time seems difficult.
2.作宾语
eg:Do you mind my sitting here?
The room needs cleaning.
注意:下列动词后要接不定式作宾语
afford.aim.appear.agree.arrange .ask .be .decide.bother .care .choose .come.dare.demand.desire.determine .expect.elect .endeavor .hope.fail .happen .help .hesitate .learn .long .mean.manage .offer .ought.plan .prepare.pretend .promise.refuse.seem.tend.wait .wish.undertake.
want .would like.
3.作表语
eg:Our task this afternoon is to find more information on the Internet.
My dream is to be a scientist in the future.
注意:不定式作主语,作表语是都是表明动作是一次性的,将来的.
4.作定语
eg:I have nothing to do.
--Do you have anything to be done,sir?
--No,thank you.I had my son do it this morning.
注意:不定式作定语时要注意主动和被动的区别,如上面两个句子,如不定式的动作是主语所作要用主动式.如不定式的动作不是主语所作要用被动式,如第二个句子.
5.作状语
eg:He came here to see me.
I'm glad to see you.
6.作补语
eg:He asked me to help him with his English.
Our teacher often encouraged us to study hard.
