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1、动词不定式,to do,否定式：not to do,分析下面的不定式在句子中作什么成分,1 To see is to believe.2 Your task is to clean the classroom.3 I expect you to give me some help.4 She was very busy and had no time to visit her friends.5 He spoke loudly(so as/in order)to be heard.,主语,宾语,表语,宾补,定语,状语,归纳：to do 在句子中可做：主、宾、表、补、定、状,不定式,（一）学习下
2、面句子，归纳用法。1.To do morning exercises is useful for our health.2.To catch the 5:00 bus early in the morning is not a good idea.3.Its important for us to learn English well.4.It is not a good idea to catch the 5：00 bus early in the morning.归纳：不定式作主语，表示具体的某次动作。若不定式结构比较复杂，常用it 作形式主语，真正的主语放在句子的后面。高考链接(1)(真
3、题改编山东)Its standard practice for a company like this one_(employ)a security officer.,to employ,（二）学习下面句子，归纳用法。1.His dream is to be a doctor.2.My work is to clean the room every day.3.My wish is to become a teacher归纳：不定式作表语，表示将来的情况，说明主语的内容。其主语常常是wish,idea,task,purpose,duty,job等表示意向、打算、计划的词。练习：Your job
4、 today is _(clean)the playground.,to clean,（三）学习下面句子，归纳用法。1.The driver failed to see the other car in time.2.He cant afford to buy the expensive car.3.I think it useful to learn a foreign language.4.I feel it my duty to say that you are wrong.归纳：1.不定式作宾语，常跟在某些动词后。不定式作宾语动词口诀决心学会选计划，拒绝答应想假装；主动设法愿希望，同意
5、请求帮一帮；准备威胁易声称，渴望申请败踌躇。其对应的动词分别为：decide/determine,learn,choose,plan,refuse,promise,want/attempt,pretend,offer,manage,expect/wish/hope,agree,ask/beg,help,prepare,threaten,tend,claim,desire/long,apply,fail,hesitate。,固定搭配,2.若不定式结构比较复杂，通常用 it 作形式宾语，真正的主语放在句子的后面，该用法常见的动词有think,find,make,believe,consider,s
6、uppose,feel等。,It形式宾语结构：主语+谓语+it+adj./n.+to do sth,3.一些动词既可跟动名词又可跟不定式作宾语，但是两种情况下的语义不同。remember to do sth.记住要做某事remember doing sth.记得做过某事forget to do sth.忘记要做某事forget doing sth.忘记做过某事regret to do sth.对将要做的事抱歉regret doing sth.对发生过的事后悔try to do sth.设法，试图try doing sth.试试看，试一试mean to do sth.打算做mean doing
7、sth.意味着stop to do sth.停下来做另一件事stop doing sth.停止做某件事,(补充)接doing形式的动词及短语1.动名词作宾语：finish doing sth.完成做某事；enjoy doing sth.喜欢做某事；practice doing sth.练习做某事；imagine doing,想象做某事；avoid doing sth.避免做某事；consider doing sth.考虑做某事；suggest doing sth.建议做某事；mind doing sth.介意做某事；keep doing sth.持续做某事2.固定短语：feel like do
8、ing sth.喜欢做某事；be busy doing sth.忙于做某事；be worth doing 值得做某事；have fun doing.做某事高兴spend(in)doing sth.花费（时间、金钱）做某事；have difficulties/trouble/problems（in）doing sth做某事有困难；,练习：1.She had agreed _(go)and see a movie with him.2.The man downstairs found it difficult _(get)to sleep.3.Im sorry,but I didnt mean_o
9、ut your secret.But you know,letting out ones secret means_ones feelings.Ato let;to hurt Bletting;hurting Cto let;hurting Dletting;to hurt,to go,to get,C,（四）学习下面句子，归纳用法。1.They told him not to be late again.2.The parents dont allow their children to go out at night.3.She invited me to have dinner with
10、 her yesterday,归纳1：不定式在某些动词后作宾补要保留to,如例1、2、3。常见动词有tell,advise,allow,ask,expect,force,want,teach,wish,persuade 等。【如：ask sb to do】,4.I heard her sing todayShe sang wonderfully 5.She was heard to sing today 6.I saw him enter the room.7.He was seen to enter the room.8.Dont make the children do such heav
11、y work.9.The workers were made to work 10 hours a day.,归纳2：不定式在感官动词和使役动词后作宾补要省略to,和宾语是主谓关系，强调 动作的全过程，如例句4、6、8；但变为被动语态时，to不能省略，如例句5、7、9。常见动词有feel（一感），listen to，hear（二听），let，make，have（三让），look at，see，watch，notice（四看）。【主动无to，被动有to】,练习：1.They were made_(work)the whole night.2.I have heard him_(speak)abo
12、ut you often.3.I decided _(write)rather than to telephone.4.My father got me _(wash)all the clothes last night.5.The children were seen_(run)down the street.6.Our teacher advises us_(read)aloud everyday.7.The cat watched the mouse_(slide)into the house but did nothing.,speak,to work,to write,to wash
13、,to run,to read,slide,（五）学习下面句子，归纳用法。1.Let us give him something to eat.2.We have much homework to do tonight.3.Are you going to attend the meeting to be held next Monday?4.She was the first woman to win the gold medal in the Olympic Games.5.Do you have the ability to read and write in English?6.I h
14、ave no chance to go sightseeing.归纳：1.不定式作定语常放在名词或不定代词后面作后置定语，表示尚未发生的动作。2.名词前有first,last,next,only等词以及最高级修饰时，其后要用不定式。3.抽象名词attempt,ability,chance,desire,determination,decision,plan,way或不定代词something,nothing等后面常用不定式作后置定语，,练习1.The airport _(complete)next year will help promote tourism in this area.2.Do
15、 you have anything _(do)tonight?,to be completd,to do,（五）学习下面句子，归纳用法。1.To see distant people clearly,he has to wear glasses.2.They took me away from my work just to ask me some questions.3.What has he done to make you so happy?4.The boy is old enough to go to school.5.She was not so stupid to do tha
16、t.6.I worked hard only to fail at last.7.There is no doubt that Mrs.Li will be glad to look after the boy.归纳：动词不定式作状语可表示目的、原因及结果等。作目的状语。通常放在句末；为了强调目的或意义，也可放在句首；作结果状语，可用于enough to,so.as to,such.as to,only to.以及too.to等结构中。,练习：1._(catch)the early flight，we ordered a taxi in advance and got up very earl
17、y.2._(work out)the difficult maths problem,I have consulted Professor Russell several times.3._(learn)more about Chinese culture,Jack has decided to take Chinese folk music as an elective course.4.Anxiously,she took the dress out of the package and tried it on,only _(find)it didnt fit.5.His father p
18、assed away,only_(leave)him a little money.6.She is too weak _（join）to join us in the outing.,To catch,To work out,To learn,to find,leaving,to join,三、不定式和疑问词连用1.When to start has not been decided.2.The question is how to do the job well.3.He told me where to find the book.归纳：疑问词“what,how,when,where,w
19、hich动词不定式”结构可作主语、表语和宾语等。高考链接1.Its no use having ideas only.Dont worry.Peter can show you_to turn an idea into an act.,how,一般式表示动作与谓语动词同时发生或在谓语动词后面发生，进行式表示动作正在进行，完成式表示动作发生在谓语动词之前。否定式：not to do,五 熟记三种结构1.They had no choice but to move.2.He could do nothing but wait for the bus.3.It hurt so much that I
20、 couldnt help but cry out in pain.归纳：1.have no choice but to do没有选择，只能做.2.can/could do nothing but do 不得不做3.cant/couldnt help but do 不得不做 比较cant help doing 忍不住做,不定式巩固练习一 1.to take,to improve 2.to have heard 3.to be laughed at 4.To succeed 5.inviting,to give 6.to know三 ABADA CAABC DBCBA,找出课文中含有动词不定式的
21、句子,Unfortunately,the doctors dont know how to make me better,but I am very outgoing and have learned to adapt to my disability.,2.I used to climb trees,swim and play football.,3.Then I started to get weaker and weaker.,4.Even after all that,no one could give my disease a name and it is difficult to
22、know what the future holds.,5.Sometimes,too,I was too weak to go to school so my education suffered.,6.My ambition is to work for a firm that develops computer software when I grow up.,7.Last year I inventedand a big company has decided to buy it from me.,8.I also have to do a lot of work,especially if I have been away for a while.,9.Just accept them for who they are,and give them encouragement to live as rich and full a life as you do.,
