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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,welcome,.,the infinitive,-,不定式,动词不定式是动词,非,谓语形式之一,。,the infinitive,动词不定式可以作句子的主语、表语、宾语、定 语、补语、状语,但不能,单独作谓语。,不定式构成：,to do,不定式否定：,not to do,动词不定式,To do that kind of thing,is foolish。,I want,to see you this evening.,All you have to do is,to finish it quickly.,Its time,to get up,.,She came here,to study English,.,Lets ask him,to join us,.,主语,宾语,表语,状语,宾补,定语,作主语,To have a good command of English,is really important now.,To give up smoking,is right.,1.,现在掌握英语真的很重要。,2.,放弃吸烟是对的。,*,.,不定式短语作,主语,时，多数情况用,it,作形式主语，把真正的主语,动词不定式置于句末，,特别,是不定式短语较长时。,*,.,动词不定式作主语，谓语动词用,第三人称单数形式,。,To have a good command of English,is really important now.,To give up smoking,is right.,1.,现在掌握英语真的很重要。,2.,放弃吸烟是对的。,It is right,to give up smoking.,It is important,to have a good command of English.,作表语,My job is,to teach English,.,Todays homework is,to read Lesson One.,1.,我的工作是教英语。,2.,今天的回家作业是读第一课,动词不定式作表语，常说明主语的内容、性质、特征。,作宾语,Fred didnt have any money,so he decided,to look for a job,.,He decided not,to tell anyone about it.,1.Fred,没有钱，所以他决定找一份工作。,2.,他决定不告诉任何人这事。,后面能接不定式作宾语的动词有：,agree,ask,choose,decide,forget,hope,learn,want,wish,would like,等。如：,作状语,He got up early,(so as/in order)to catch the early bus,.,They jumped with joy,to hear the news,.,Im too tired,to walk,any further tonight.,目的状语,.,原因状语,.,结果状语,不定式结构可用于,ask,tell,order,want,allow,advise,等及物动词的宾语后充当宾补,1.She told me,to wait here,.,2.Lets ask him,to join us,.,作宾补,不定式作定语时，可放在所修饰的名词或代词之后（定语后置）,1.He has some questions,to ask.,2.Whats the best way,to learn English well,?,注：不定式与它修饰的名词、代词构成了动宾结构。如不定式是不及物动词，还须加上介词。,作定语,the place to go,to,a pen to write,with,a room to live,in,a baby to take care,of,1.,我的父亲决定不从事这工作,.,My father decided,not to,take,up this job.,注意,动词不定式的否定式只须在,to,前加,not,2.,警察告诉我们不要在马路上踢球。,The policeman told us,not to play,football in the street.,注意,在某些固定句型或搭配中，动词不定式的肯定和否定形式都不加,to,make/have/let,sb,.,(not),do,2.see/hear/notice/watch,sb,.,(not)do,3.had better,(not)do,4.would rather(,not)do,Mum,let me buy,some apples yesterday.,You,d,better drink,more water.,I,d,rather not see,the film.,I often,see the students play,basketball in the playground.,We dont know,how to,solve the problem.,We,dont know,how we can,solve the problem.,疑问词,+to do,疑问词,+,sb+can,/shall/will/should do,句型转换,The foreigners want to know,how to,learn Chinese well,The foreigners want to know,how they can,learn Chinese well.,He cant decide,which one to choose,.,He cant decide,which one he should,choose.,I really dont know,what I should,say at the meeting,I really dont know,what to say,at the meeting.,Could you tell me,when to have,our class meeting,Could you tell me,when we will have,our class meeting.,句型转换,(in order)to do,so that,sb,can do,He keeps an English diary(in order),to improve,his writing skills.,He keeps an English diary,so that he can improve,his writing skills.,Mary put on her glasses,(in order)to see,the blackboard clearly.,Mary put on her glasses,so that she could see,the blackboard clearly.,You should eat more vegetables and less meat,so that you can,lose weight.,You should eat more vegetables and less meat,in order to,lose weight.,句型转换,too+a./ad.+(for,sb.)to,do,so+a./ad.+that,sb.cant do,The little boy is,too young to go,to school now.,The little boy is,so young that he cant,go,to school now.,This exercise is,too difficult for us to work,out.,This exercise is,so difficult that we cant work,it out.,The box was,too heavy for me to carry,.,The box was,so heavy that I couldnt carry,it.,找出下列句中的不定式，并说出其在句中的成分,1.To answer your question is hard.,2.What do you want to say?,3.Its hard for me to do this job.,4.Tom doesnt know when to start.,5.Is there a way to learn English well?,6.They hurried off to catch the early bus.,7.He prefers to work early in the morning.,主语,宾语,主语,宾语,定语,状语,宾语,练习,8.He was happy to hear the news.,9.The first thing for us is to get everything ready.,10.The doctor advised me to take a good rest.,状语,表语,宾补,句型转换：,To control the population is necessary for the governments.,_ _ for the government to control the population.,2.,Liqiang,went to the school library in order to get more information about American customs.,Liqiang,went to the school library _ _ _ _ get more,imformation,about American customs.,3.The old lady was too tired to walk any farther.,The old lady was _ tired _ _ _ walk any farther.,4.You should renew the book so that you can keep it longer.,You should renew the book _ _ _ keep it longer.,5.The boy ran so fast that he caught the bus in time.,The boy ran _ _ _ catch the bus in time.,Its necessary,so that he could,so,that he couldnt,in order to,fast enough to,用动词的适当形式填空：,1.My hobby is _(collect)coins.,2._(see)is _(believe).,3.You had better _(not eat)so much sweets.,4.Our teacher let us _(copy)the text twice.,5.He is always the first _(get)to school.,6.My way _(study)English is _(keep),practising,.,7.Its exciting _(watch)a football match.,8.Im sorry _(hear)that.,9.She was too excited _(say)a word.,10.I often go the,the,English Corner _(,practise,)Eng
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