【高中英语】非谓语动词(一)动词不定式

非谓语动词

非谓语动词主要包括不定式&动名词&分词（现在分词和过去分词），.即动词的非谓语形式除了不能独立作谓语外,可以承担句子的任何成分

它有三种形式：不定式，分词（现在分词、过去分词），动名词

(一)动词不定式：

      （to）+do，具有名词、形容词、副词的特征.

　　否定式：not + (to) do

　　（1）一般式：不定式的一般式所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后.

　　例如：

　　I'm glad to meet you.

　　He seems to know a lot.

　　We plan to pay a visit.

　　He wants to be an artist.

　　The patient asked to be operated on at once.

　　The teacher ordered the work to be done.

　　（2）进行式：不定式的进行式所表示的动作与谓语动词动作同时发生，例如：

　　The boy pretended to be working hard.

　　He seems to be reading in his room.

　　（3）完成式：不定式的完成式表示的动作发生在谓语动词动作之前，例如：

　　I regretted to have told a lie.

　　I happened to have seen the film.

　　He is pleased to have met his friend.

不定式的句法功能：

（1）作主语：

　　To finish the work in ten minutes is very hard.

　　To lose your heart means failure.

²  动词不定式短语作主语时，常用it作形式主语，真正的主语不定式置于句后，例如上面两句可用如下形式：

　　    It is veryhard to finish the work in ten minutes.

　　    It meansfailure to lose your heart.

常用句式有：

1、It+ be+名词+to do。

2、It takes sb.+some time +to do。

3、It+ be +形容词+of sb +to do。

4、It+ be+形容词+for sb.+ to do。

常用careless,,clever,good,foolish,honest,kind,lazy,nice,right,silly,stupid,wise,等表示赞扬或批评的形容词，不定式前的sb.可作其逻辑主语。

　　（2）作表语：

　     　Her job is toclean the hall.

　　     Heappears to have caught a cold.

　　（3）作宾语：

　　     常与不定式做宾语连用的动词有：want, hope, wish,offer, fail, plan, learn, pretend, refuse, manage, help, agree, promise,prefer, 如果不定式（宾语）后面有宾语补足语，则用it作形式宾语，真正的宾语（不定式）后置，放在宾语补足语后面，例如：

　　     Marxfound it important to study the situation in Russia.

　　     动词不定式也可充当介词宾语，如：

　　     I have nochoice but to stay here.

　　     He didnothing last Sunday but repair his bike.

　　     动词不定式前有时可与疑问词连用，如：

　　     He gaveus some advice on how to learn English.

　　（4）作宾语补足语：

　　     在复合宾语中，动词不定式可充当宾语补足语，如下动词常跟这种复合宾语：want, wish, ask,tell, order, beg, permit, help, advise, persuade, allow, prepare, cause, force,call on, wait for, invite.

　　     有些动词如make, let, see, watch, hear,feel, have等与不带有to的不定式连用，但改为被动语态时，不定式要加to, 如：

　　     I saw himcross the road.

　　     He wasseen to cross the road.

　　（5）作定语：

　　     动词不定式作定语，放在所修饰的名词或代词后。与所修饰名词有如下关系：

　　     ①动宾关系：

　　       I havea meeting to attend.

　　      注意：不定式为不及物动词时，所修饰的名词如果是地点、工具等，应有必要的介词，如：

　　           Hefound a good house to live in.

　　          Thechild has nothing to worry about.

　　          Whatdid you open it with?

　　　      　如果不定式所修饰名词是不定式动作承受者，不定式可用主动式也可用

被动式：

　　          Haveyou got anything to send?

　　          Haveyou got anything to be sent?

　　②说明所修饰名词的内容：

　　We have made a plan to finish the work.

　　③被修饰名词是不定式逻辑主语：

　　He is the first to get here.

　　（6）作状语：

　　①表目的：

　　He worked day and night to get the money.

　　She sold her hair to buy the watch chain.

　　注意不定式放句首时，逻辑主语与句子主语要一致：

　　wrong：To save money, every meanshas been tried.

　　right：To save money, he has triedevery means.

　　wrong：To learn English well, adictionary is needed.

　　right：To learn English well, heneeds a dictionary.

　　②表结果(往往是与预期愿望相反的结果)：

　　He arrived late only to find the train had gone.

　　I visited him only to find him out.

　　③表原因：

　　They were very sad to hear the news.

　　④表程度：

　　It's too dark for us to see anything.

　　The question is simple for him to answer.

　　（7）作独立成分：

　　To tell you the truth, I don't like the way hetalked.

　　（8）不定式的省略：保留to省略do动词。

　　If you don't want to do it, you don't need to.

　　（9）不定式的并列：第二个不定式可省略to。

He wished to study medicineand become a doctor.