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1、高中英语同步辅导,Book2A Unit1,动词不定式的用法,By Edison,1. 动词不定式的用法,作主语 作宾语 作定语 作表语 作宾补 作状语,动词不定式,2.动词不定式的时态和语态,3. 巩固练习,1. 动词不定式作主语,动词不定式作主语，谓语动词用第三人称单数。,How to get enough money is still a question.,To make a plan for our study is very important.,1. 动词不定式作主语,有时候为了保持句子平衡，常用it作形式主语，放到句首，而将作真实主语的动词不定式放到句末。,It will ta
2、ke a whole day to get there by car.,It is important to make a plan for our study.,It is impossible for me to finish the work in a week.,2. 动词不定式作宾语,动词不定式作宾语常用于下列及物动词后：,want, agree, decide, manage, wish, hope, ask, like, love , choose, promise, continue, plan, learn, expect, offer, prepare, refuse, p
3、retend, attempt, intend, threaten, seek, hesitate, long, desire, fail等等。,He promised to come but he hasnt turn up yet.,The boys are longing to watch the World Cup.,动词不定式作宾语应注意的问题,1.有些动词后跟动词不定式和动名词作宾语意义截然不同,try, go on, stop, mean, regret, remember, forget等,go on to do sth.继续做另一件事,go on doing sth.接着做同
4、一件事,After a short rest, they went on doing the work.,After finishing the homework, the students went out to play football.,regret to do sth.遗憾地做某事,regret doing sth.后悔作了某事,I regret to say that you havent passed the exam.,I regret having told him about it,动词不定式作宾语应注意的问题,2. 如果不定式作宾语而后面又有一个宾语补足语，这时要用it作
5、形式宾语而把这个动词不定式放到补语后。,I feel it my duty to help you.,I once thought it impossible for us to finish the job in such a limited time.,3.动词不定式作定语,动词不定式作定语，它与所修饰的名词或代词可能是主谓关系，也可能是动宾关系。如果是动宾关系，不定式主动表示被动。,He was the last one to leave school yesterday.,We have much homework to do everyday.,4.动词不定式作表语,动词不定式常放在
6、系动词（be动词）后作表语，有时也放在其他少数连系动词如：remain, seem, sound等后。,当表语是动词不定式时，作主语的谓语动词也只能是动词不定式，即主语和表语结构要一致或对称。,His plan is to spend a few days in the countryside.,He appears to have caught cold.,To see is to believe,当表语是动词不定式时，作主语的谓语动词也只能是动词不定式，即主语和表语结构要一致或对称。,当主语部分有动词实义do的某个形式时，做表语的动词不定式可以省略to。,The only thing we
7、 can do is wait till he comes back. We can do nothing but wait.,5.动词不定式作宾补,常要求跟动词不定式作宾补的动词有：,（1）可接带to的不定式作宾补的动词有：,ask, get, allow, forbid, prefer, force, inspire, advise, cause, tell, order, warn, teach, permit, wish, invite, encourage等,Youd better get Tom to do it.,She doesnt allow me to use her co
8、mputer.,The teacher told him not to be late again.,He invited us to attend his birthday party.,（2）可跟省to的动词不定式作宾补的动词有：,在部分感官动词和使役动词后，如：,see, watch, notice, observe, look at, listen to, feel, make, let, have,注：help后可跟省to或带to的不定式作宾补。,The teacher had us recite the text every day.,I was let to do the exp
9、eriment alone.,Was he noticed to leave the house?,动词不定式在主动语态中用省to的形式作宾补，但在被动语态的句子中，要用带to的形式作主语补语。,（3）有的动词后可以跟to be形式作宾补，而不是to do作宾补。如：,think, consider, suppose, believe, imagine, find, prove等,6.动词不定式作状语,动词不定式作状语用来修饰动词、形容词、副词或整个句子，通常表示目的、原因、结果、程度等。,I got up early in order to /so as to catch the first
10、 bus.,(作目的状语）,To learn English well, you should practise it whenever possible.,(作目的状语）,He wept to hear the news.,(作原因状语）,I am glad to see you here.,(作原因状语）,He hurried to the post office, only to find it closed.,(结果状语）,The boy is too young to dress himself.,（同上）,当tooto结构中的不定式前有形容词nervous, pleased, wi
11、lling, happy, delighted, glad等时，to后面译作肯定。,They are too nervous to leave.,当too前有only时，only too to译作肯定。,I am only too pleased to help you.,当不定式前有表否定意义的词时，译作肯定。,We are never too old to learn.,动词不定式的时态和语态,1. 动词不定式的一般式（to do）用于表示不定时所表示的动作与句子谓语动词几乎同时发生。,saw her enter the room.,I have some important news t
12、o tell you.,2. 动词不定式的进行式,动词不定式的进行式表示动作正在进行，和句子谓语动词所表示的动作同时进行。,He pretended to be reading when his mother came into his room.,They are said to be building another bridge across the river,3. 动词不定式的完成式,动词不定式的完成式表示动作发生在谓语动词所表示的动作前。,I am sorry to have kept you waiting so long.,I happened to have read the
13、 book before.,巩固练习,1. Several of these washes and dryers are out of order and_. need to be repairing B. repairing is required of them C. require that they be repaired. D. need to be repaired.,解析：and并列谓语动词， need to be repaired相当于need repairing.,D,2. I wish you had brought your family with you. Ill ge
14、t them _ next time. A. coming B. to come C. come D. have come,B,解析：使役动词get后跟带to的动词不定式作宾补，let，make, have后跟省to的动词不定式作宾补。,3. We climbed to the top of the tower _a better view of the area. getting B. got C. having got D. to get,D,解析：动词不定式作目的状语，其余几个没这功能。,4. What is the way Smith thought of _ enough money
15、 to buy the new house. A. getting B. having got C. being got D. to get,D,解析：名词the way后跟有两个定语，一个是定语从句Smith thought of， 一个是动词不定式to get enough money to buy the new house.,5. The young assistant was noticed _ the bank alone last night. A. entering B. enter C. to enter D. entered,C,解析：感官动词后可跟现在分词和省to的动词不
16、定式作宾补。不定式表示全过程，现在分词表示正在进行。在被动语态中用带to的动词不定式作主语补语。,6. Wang Dong wanted to surf the Internet, but his father told him _. A. not to do B. not do it C. do not to D. not to,D,解析：tell sb. (not) to do sth. 为了避免重复，后面省略了surf the Internet.,7. The party was successful, but we thought it a pity not _ you. A. invite B. to invite C. inviting D. to have invite
