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1.不定式做主语
(1)不定式的逻辑主语由引导词来引导,这类引导词最常见的是for 和of。这一类相应的搭配有以下:absurd, bold, brave, courageous, careful, careless, clever, wise, foolish, silly, stupid, good, nice, kind, thoughtful, considerate, greedy, generous, honest, modest, polite, rude, cruel, selfish, lazy, wicked, wrong。如:
Doctors say that walking is one of the best methods for human beings to keep fit。医生说,走路几乎是保持健康最好的方法。
It’s so considerate of to arrange the accommodation for us。
都帮我们安排了食宿,您真是考虑的太周到了。.
(2)不定式做主语补足语:
掌握常用不定式做主语补足语的句型。注意不定式表示的动作发生的时间,并采用相应形式。如:be said / reported / thought / believed / known / supposed + to do sth.例如:
You were warned not to read in the strong light,cause it will hurt your eyesight。不要在强光下看书,会伤害你的眼睛。
2.不定式做宾语
掌握要求接不定式做宾语的动词:
afford, arrange, attempt, claim, desire, determine, expect, fail, guarantee, endeavor, intend, pledge, pretend, resolve, request, swear, tend, venture。如:
I can’t afford to buy a house of my own now.我现在还买不起自己的房子。
3.不定式做定语
(1)被修饰的名词前有序数词、形容词最高级或next, last, only, not a, the, very等限定词时,该名词用不定式做定语。如:
He is the last human being to see a live dinosaur 他是最后一个看到活恐龙的人(哈哈,小编插一句,这也太传奇了)
(2)如果其动词要求不定式做宾语,相应的名词一般用不定式做定语。如:
decision to do→decide to do
He made decision to do the housework=he decided to do the housework.(他决定做家务了)