不定式的句法功能詳解（分類+例句）

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1.不定式做主語
(1)不定式的邏輯主語由引導詞來引導，這類引導詞最常見的是for 和of。這一類相應的搭配有以下：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。醫生說，走路幾乎是保持健康最好的方法。
It’s so considerate of to arrange the accommodation for us。
都幫我們安排了食宿，您真是考慮的太周到了。.
(2)不定式做主語補足語：
掌握常用不定式做主語補足語的句型。注意不定式表示的動作發生的時間，並採用相應形式。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。不要在強光下看書，會傷害你的眼睛。
2.不定式做賓語
掌握要求接不定式做賓語的動詞：
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.我現在還買不起自己的房子。
3.不定式做定語
(1)被修飾的名詞前有序數詞、形容詞最高級或next, last, only, not a, the, very等限定詞時，該名詞用不定式做定語。如：
He is the last human being to see a live dinosaur 他是最後一個看到活恐龍的人（哈哈，小編插一句，這也太傳奇了）
(2)如果其動詞要求不定式做賓語，相應的名詞一般用不定式做定語。如：
decision to do→decide to do
He made decision to do the housework.he decided to do the housework.(他決定做家務了)