Unit5Doyouwanttowatchagameshow?课时3Grammar八年级英语讲义32.docx
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1、Units 5 Do you want to watch a game show?Grammar (课时 3)般知识精讲动词不定式动词不定式由 t。+动词原形”构成,有时可以省略t。动词不定式在句中可作宾语、宾语补足语、状 语、定语等。动词不定式在句子中不作谓语,所以没有人称、数和时态的变化。(一)不定式的具体用法:考点1作宾语在 offer, plan, hope, decide, learn, wish, want agree, refuse, begin, start, forget remember 等动词之 后作宾语。Finally he offered to go shopping
2、 with me. 最 后他主动提出跟我一起购物。I want to see a film tomorrow evening.我想 明天晚上去看一部电影。在 know, decide, remember 等动 词之后可用疑问词+动词不定 式”作宾语。I dont want to stay at home, but I dont know where to go.我不想待在家里,但是我不知 道去哪里。考点2作宾语在 teach, ask, allow, invite, advise等动词之后用不定式作宾补。My parents allow me to play puter games at we
3、ekends.我父母允许我周末玩电脑游 戏。补足语在let, make和have之后用省略to 的不定式作宾补。My mother often makes me clean (hewindows.我妈妈常常让我擦窗户。考点3作状语动词不定式表示目的。They are working hard to save the injured tiger.他们正在努力营救那只受伤的老虎。考点4作定语不定式在句中作定语,置于被修饰 的名词或代词之后。She was the first person to think of the idea.她是第一个想出这个主意的人。考点5作主语不定式直接作主语To say
4、 is easy, but to do is not easy.说起来容 易,做起来难。It 作形式主语,不定式(短语)作 It is difficult (for me) to learn maths well.真正的主语(对我来说)学好数学很难。【巧学妙记】只能接不定式作宾语的动词同意提出做方案,要求容许来帮助。准备决定遭拒绝,敢于选择有希望。不能做到莫假装。设法学会强强强agree (同意);offer 提出);plan (方案);ask (要求):promise (容许);help(帮助);prepare准备):decide (决定);refuse拒绝);dare (敢于);choos
5、e (选择);wish, hope, want, expect 1 希望,想要);fail (不能;忘记);pretend 1 假装); manage (设法);learn (学会)(二)不带t。的不定式的使用动词不定式通常带to,但在有些搭配中不带to,在另一些搭配中可带to可不带to。归纳起来,以下情 况卜.使用不带I。不定式:1 .在 can/could, may/might, will / would, shall / should, must, need, dare 等情态动词之后,动词 不定式不带t。2 .在表示感觉意义的动词,如see, feel, watch, notice,
6、smell, hear, observe等后,或是表示致使 意义的动词,如have, let, make等后,动词不定式不带to。I often heard him say that he would study hard.1 must have him sec his own mistakes.但是,当这类结构转换为被动语态时,后面的不带I。的不定式一般要转换为带t。不定式。He was often heard to say that he would study hard.After he had finished speaking, he was made to answer innum
7、erable questions.3 .在动词help之后可用不带to的不定式,也可用带I。的不定式。Help the old lady (to) carry the heavy box.4 .在 had better, would rather, may / might as well, rather than, can not but 等搭配之后,动词不定式也 不带tOoUnless you feel too ill to go out, I would rather not stay at home tonight.She could not but criticize his fool
8、ish behavior.5 . 在 make do, make believe, let drop, let fall, let fly, let slip, let drive, let go off, hear say, hear tell, leave go of等固定搭配中,用不带to的动词不定式。They let go of the rope.他们松开了 绳子。John let fly a torrent of abuse at me.约翰朝我痛骂了 一顿。Ive heard tell of him.我听说过他。Some of the faculty were let go for
9、 lack of the students.由于生源缺乏,一些教职员工被解雇 了。6 .在介词but, except之后,如果其前有动词do的某种形式,其后不定式一般不带t。,反之那么必须 带to,表示不得不,只能”。He will do anything except work on the farm.There was nothing left for the enemy lo do hut surrender.The spy was both hungry and cold; (here was nothing left for him but to give in.I had no c
10、hoice but to wait till it stopped raining.下面一些短语是固定搭配,不带 to: can not help but, can not choose but, can not but do nothing but, have nothing to do but。I can not but admire his courage.如果上述句中有do, to省略:I did nothing but watch TV last night.如果是下面一个固定搭配,就带io:I have no choice but to give up my idea.7 .紧跟在
11、why或why not之后的动词不定式总是不带2。但是,紧跟在who, what, which, whether 等连接词后的不定式带tOoWhy stand up if you can sit down?Why not ask your teacher when you dont understand the meaning?You neednt decide yet whether to study arts or science.(三)不定式的完成式和进行式1 .构成完成式:to+ have done进行式:to+ be doing2 .用法完成式:如果不定式所表示的动作(状态)发生在主
12、要谓语动作之前,那么不定式就要用完成式形式。进行式:如果主要谓语动作(情况)发生时,不定式所表示的动作正在发生,那么不定式就要用进行 式形式。She feels relaxed to have finished writing her thesis before (he deadline.The Vikings are believed to have discovered America.When you called me last night, I happened to be working on the puler.(四)不定式的被动形式当不定式的逻辑主语是动作的承受者时,不定式要用
13、被动形式,包括它的一般式和完成式。For twelve years, Spanish censorship(审查机构)did not allow Lorcas name to be mentioned and his work to be published.The snow was supposed to have been blown off (he mountain.(五)不定式的否认形式否认形式是在不定式的标志lo前加notoI decided not to ask him again.Please remember not to leave the lights on when yo
14、u are out.u能力拓展一、单项选择(2021 湖北鄂州市中考真题)What did the teacher say just now?He toki us in (he river.A. swimB. swimmingC.not to swimD. not swim(2021 辽宁营口市中考真题)The lecture (讲座)is worth. Please tell John late.A. attend;not be B. to attend; to beC.attended; to beingD. attending;not to be(2021四川广元市中考真题)The bo
15、y is crazy about music and we always hear him in the musicroom.A. to singB. singsC. singingD. sing(2021 黑龙江大庆市中考真题)一English is difficult at the beginning.Yes, but if you keep, you can make progress.A. to be learned; tryingB. to leam; tryingC. to be learned; to tryD. to learn; to try(2021 江苏宿迁市中考真题)T
16、he policeman told the children in the river. Its too dangerous!A. to not swim B. not to swim C. not swimD. not swimming(2021湖南益阳市中考真题)Our teachers dont allow us mobile phones in the school.A. to useB. useC. using(2021.四川凉山彝族自治州.中考真题)Hi! Alice, why are you in such a hurry?_my best friend from Canada
17、at the airport.A. MeetB. MeetingC. To meetD. Met(2021 黑龙江绥化市中考真题)The teacher with curly hair teaches us the guitar.A. to playB. playC. playing12021内蒙古包头市中考真题)the online shopping, my grandma bought a smart phone.A. EnjoyedB. EnjoyingC. EnjoyD. To enjoy(2021吉林中考真题)Mr. White invited me the hill with hi
18、m last weekend.A. to climbB. climbC. climbing(2021 贵州贵阳市中考真题)Mario and his friends are making some plans in an old peopleshome this summer.A. workB. workingC. to work(2021 黑龙江鸡西市中考真题)Its necessary for students eye exercises.A. doB. doingC. to do(2021湖南怀化市中考真题)The government asks people the rubbish f
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