四、不定式用作賓語補足語

Who taught you to drive? 誰教你開車的?

He warned me not to touch it. 他警告我不要碰它。

What caused him to change his mind? 什么使他改變主意的?

五、不定式用作定語

I have a question to ask you. 我有一個問題要問你。

It is a pleasant thing to remember. 這是一件值得記住的愉快的事。

He is not a man to tell a lie. 他不是個說謊的人。

【注】有的名詞(如way, chance, right等)后用作定語的不定式可換成of doing sth：

It’s the best way to do [of doing] it. 這是做此事最好的辦法。

但是，以下名詞后接不定式作定語時通常不能換成of doing sth：

attempt 試圖                          courage 勇氣

decision 決定                         effort 努力      

fortune 運氣                          failure 失敗     

invitation 邀請                        permission 允許

promise 允諾                         wish 愿望

六、不定式用作狀語

不定式作狀語可以表示多種關系(如目的、結果、原因、條件等)：

I went to France to learn French. 我到法國去學法語。(表目的)

He returned home to find his wife waiting for him. 他回到家發現他的妻子在等他。(表結果)

You would make a great mistake to accept his offer. 你要是接受他的建議，你就犯了大錯誤。(表條件)

We are proud to be members of this team. 作為這個隊的隊員我們感到很自豪。(表原因)

He opened his mouth as if to say something. 他張開嘴，好像要說什么。(表方式))

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