2014年在职联考英语高分备考之动词不定式(5)

　　六、用作状语

　　1.目的状语，置于句首或句末，置于句首时常表示强调。如：

　　1) In order not to offend people, learning about language etiquette is just as important as learning grammar or vocabulary.

　　2) A group of young people got together to(in order to / so as to) discuss this question.

　　to do / in order to do / so as to do用作目的状语，置句末时都可以用，置句首时只用to do / in order to do。so as to do一般不置于句首，可以引导结果状语从句，in order to do不引导结果状语从句。

　　2.原因状语，多见于“sb.+be+adj.+to do...”结构句中。如：

　　1) My dogs name is “Lucky”—a good name for him because I feel very lucky to have him.

　　2) On Monday he told a radio interviewer that he had run out of money to buy old bikes.

　　3.结果状语，多见于“too...to”，“enough to...”结构句中。如：

　　1) Then I’m too tired to do well. What should I do?

　　2) The room needs to be big enough for three people to live in.

　　4.有些动词不定式作状语，常说明前面形容词的性质和特性。动词不定式与句子的主语有逻辑的动宾关系。动词不定式前面的形容词一般是：cheap, dangerous, difficult, easy, fun, hard, interesting, necessary。不定式常用主动式表被动意义。

　　... the mistakes you made are necessary for you to learn and understand.

　　这类句子中的动词不定式可改为主语。

　　5.独立动词不定式多用作插入语，表示说话人的心理状态或对事情的看法。如：

　　1) I’d like to stay healthy, but to be honest, I only eat food that tastes good.

　　2) To begin with, she spoke too quickly, and I couldn’t understand every word.