动词不定式的形式.ppt

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1、动词不定式,动词不定式的形式 动词不定式（the Infinitive）是一种非谓语动词,由“to+动词原形”构成，其否定式是“not to+动词原形”。动词不定式虽然不能作谓语动词，但仍保留动词的特征，它可以有自己的宾语或状语而构成动词不定式短语。如to study hard，to play basketball。,Grammar,动词不定式,动词不定式的时态和语态,时态,语态,Grammar,动词不定式,动词不定式的时态和语态,1.Kate hopes to become a university student this year.凯特希望今年能成为一名大学生。2.Im sorry to

2、 have kept you waiting.很抱歉让你久等了。3.They seemed to be discussing something important.他们似乎正在讨论重要的事情。4.She wishes to be sent to work in Shanghai.她希望能被派到上海工作。,Examples：,Grammar,动词不定式,动词不定式的句法功能,1作主语 To talk with him is a great pleasure.注意：动词不定式短语作主语时，为了保持句子的平衡，往往用it作形式主语，而把不定式短语置于谓语动词之后。如：It is a great p

3、leasure to talk with him.It is a great pleasure to see you again.,Grammar,动词不定式,动词不定式的句法功能,3作宾语（1）有些及物动词常用动词不定式作宾语。这些动词有：ask,want,try,hope,wish,learn,choose,decide,expect,afford等。如：Lucy wants to buy a computer.We cant afford to go on vacation this year.,2作表语His wish is to become a basketball star li

4、ke Yao Ming.,Grammar,动词不定式,动词不定式的句法功能,3作宾语（2）不定式短语作宾语时，如果还带有宾语补足语，往往把不定式宾语放在宾语补足语之后，而用it作形式宾语。如：I find it interesting to study yoga.,Grammar,动词不定式,动词不定式的句法功能,4作复合宾语中宾语补足语常跟不定式作宾补的动词有：ask,invite,help,tell,hear，make等。如：I invited her to have coffee.Tell the children not to play on the street.,Grammar,动

5、词不定式,动词不定式的句法功能,4作复合宾语中宾语补足语注：（1）在feel,hear,see,watch,notice等感官动词或let,make,have等使役动词后面，复合宾语中的动词不定式通常不带to。但上述动词转换为被动结构时，其后的不定式仍须带to。如：We often hear him sing in the room.He was seen to enter the theatre.,Grammar,动词不定式,动词不定式的句法功能,5作定语动词不定式可用作修饰名词或代词的定语，用作定语的不定式需跟在所修饰的名词或代词之后。如：We need someone to help h

6、im with the typing.She is a very nice person to work with.,Grammar,动词不定式,动词不定式的句法功能,6作状语动词不定式可用作修饰动词或形容词的状语，通常放在其修饰的动词或形容词之后。如：(1)The young often come here to listen to the old mantell stories.(作目的状语)(2)Everyone will be surprised to see the changes in Beijing.(作原因状语)(3)The hall is big enough to hold

7、 a lot of people.(作结果状语),Grammar,动词不定式,动词不定式的句法功能,7动词不定式的其他用法(1)疑问词+动词不定式疑问词what，who，which，when，where，how和连词whether之后，可跟一个带“to”的不定式，构成一个特殊的不定式短语，可在句中作主语、宾语、表语。如：How to get there has not been decided yet.（主语）Kate didnt know what to say.（宾语）,Grammar,动词不定式,动词不定式的句法功能,7动词不定式的其他用法（2）“for+名词或代词宾格+不定式”和“of

8、+名词或代词宾格+不定式”的用法当前面的形容词表示不定式行为的特点时，常用“for+名词或代词宾格+不定式”结构引出不定式的逻辑主语；而当前面的形容词表示不定式逻辑主语，即行为人的品行特点时，则用“of+名词或代词宾格+不定式”结构引出不定式的逻辑主语。如：Its impossible for him to finish the work himself.Its very kind of you to help him every day.,Grammar,Exercise A,A.Read and translate.,1.Each bird loves to hear itself sin

9、g.2.Early to bed and early to rise makes a man healthy,wealthy and wise.3.Eat to live,but not live to eat.4.It is hard to please all.5.One is never too old to learn.6.To save time is to lengthen life.,Grammar,人人都有悦己之心。,早睡早起，健康、财富、智慧伴你行。,吃饭为了生存，但生存不能只为了吃饭。,众口难调。,活到老，学到老。,珍惜时间就是延长生命。,Exercise B,B.Thin

10、k and match.,His wish isIts fun She didnt work hard enough Mr.Lin refusedShe is a nice person 6.They asked me,a.to work with.b.not to worry about the accident.c.to become a scientist.d.to pass the exam.e.to talk with his manager.f.to swim in summer.,作定语,作宾补,作状语,作宾语,作主语,Grammar,作表语,Exercise C,C.Think

11、 and rewrite.,1.This book tells you how you can win at chess.This book tells you _ at chess.2.Could you please tell me where I can buy the dictionary?Could you please tell me _ the dictionary?3.The students are discussing what they will do with the rubbish.The students are discussing _with the rubbi

12、sh.,Many countries have discovered how they can save their rainforests.Many countries have discovered how to save their rainforests.,how to win,where to buy,what to do,Grammar,Example A:,Exercise C,C.Think and rewrite.,“Please send the letter for me.”Lily said to Mary.Lily asked Mary to send the let

13、ter for her.,4.Mrs.Green said to us,“Turn off the lights when leaving the room.”Mrs.Green told us _ off the lights when leaving the room.5.“Dont stay up too late,Tom”.Mother said.Mother told Tom _ up too late.6.“Dont make so much noise!”The police ordered the young man.The police ordered the young m

14、an _ so much noise.,to turn,not to stay,not to make,Example B:,Grammar,Exercise D,D.Read and complete.,1._(生活在上海)is my lifetime dream.2.Father promised _(给他买辆自行车)on his 18th birthday.3.Could you help me _（寻找钥匙）?I cant find them.4.After walking for three hours,we stopped _(休息)5.Its so hot today.Id li

15、ke to have _(喝的东西).,To live in Shanghai,to buy him a new bicycle,(to)look for the keys,to have a rest,something to drink,Grammar,Consolidation,What have we learned?,1.The rainforest and the problems of it.,greatest treasure,valuable,warm,a lot of rain,perfectFor animals and plants,home for half the

16、speciesDisappearing,being cut for wood,cleared for cities androads,burned for farmland,2.Ways to protect the rainforest.,Ecotourism,set aside land as wild rainforest,3.Grammar:the Infinitive 动词不定式,作主语，作宾语，作定语，作状语，作宾补，作表语疑问词+不定式，,Homework,What will we do?,Review the words and phrases in this section.2.Brainstorm some words about rainforests.3.Finish the workbook exercises.4.Read and retell the passage.5.Discuss with your friends abouthow to protect wild animals and write a short passage.,