五、用作补语
动词不定式作补语时，在主动语态句里补宾语，在被动语态句里补主语，句子的宾语或主语是不定式动作的逻辑执行者。如果不定式是to be done，句子的宾语或主语就是逻辑承受者。
1.在主、被动语态句里用带to的动词不定式作补语的动词主要有：要求允许提议(ask, allow, permit, advise)，期望邀请鼓励(expect, suppose, invite, encourage)，教导告诉想要(teach, tell, want)，等待希望愿意(wait for, wish, would like / love)。如：
1) I’d invite her to have dinner at my house.
2) Teenagers should be allowed to choose their own clothes.
3) Email English is supposed to be used on mobile phones.
2.动词不定式作补语，在主动语态句里不带to，被动语态句里带to时多数动词是感官动词和使役动词，包括四“看”：look at, observe, see, watch，三“让”：have, let, make，二“听”：hear, listen to，一“感觉”：feel，一“注意”：notice。如：
1) This picture makes me feel tense!
2) Of course we want to see Liu Yu achieve his dreams.
3.help后接动词不定式作补语，to可带可不带。一般说来，带to表间接帮助，不带to表直接帮助。在被动语态句里，或者用不定式的否定式作补语时要带to。如：
1)... they can help you to compare two different products so that you can buy the one you really need.
2) Using email English helps you write quickly.
4.be said, be sure, happen, seem等后面可以接带to的动词不定式作主语的补语。如：
1) He doesn’t seem to have many friends
2) Be sure not to miss them if they come to a city near you.
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.
七、动词不定式的复合结构
动词不定式的复合结构是“for / of sb. to do sth.”，for / of引出不定式动作的逻辑主语。这种结构在句子中可以作主语、宾语、表语、定语、状语等。不定式复合结构的介词用for还是of，主要决定于前面形容词的性质。一般说来，of前面的形容词是careful, clever, foolish, good, kind, nice, wise等，既说明人的特性，又说明不定式动作的特性。for前面的形容词是dangerous, difficult, easy, hard, heavy, important, interesting, necessary等，一般说明不定式动作的特性，不说明人的特性。前面如果是名词用for。如：
1. It’s also probably a good idea for parents to allow teenagers to study in groups during the evening.
2. Zoos are terrible places for animals to live.
八、带疑问词的不定式短语
动词不定式前面可以带疑问代词what, which, who或疑问副词how, when, where, why等。这种结构起名词的作用，在句子里用作宾语、主语、表语等，或者单独使用。要注意的是，why后面的不定式不带to。如：
1.用作句子的成分。
1)I don’t know what to try next. (p.49)(作宾语)
2) Where to go is not decided yet.(作主语)
2.单独使用时相当于一个特殊疑问句。
1) What to do next? (=What will we / you do next?)
2) Why go there? (=Why do we / you go there?)
九、动词不定式的否定式
不定式的否定式是not / never to do...，不带to的不定式的否定式是not / never do...如：
1. Sometimes they have disagreements, and decide not to talk to each other.(p.8)
2. His parents tell him never to drive after drinking.
以上是2015年在职联考英语动词不定式相关辅导资料，以供大家查看了解，考生如若获知其他关于教育考试的所有相关信息，请密切关注唯学网，唯学网小编会在第一时间为考生发布相关教育考试的报道。
