初中英语非谓语动词讲解PPT课件

-,1,当我们要表示“想做某事、需要做某事或决定做某事”时，就会出现两个动词连用的情况，这时应如何表达呢？同学们自然会想到wanttodosth.,needtodosth.和decidetodosth.等表达方式。,Modulegrammar,动词不定式,-,2,1.什么是动词不定式？,主要行为动词后面的动词采用了“to+动词原形”的结构，我们把这种结构称为动词不定式（有时可以不带to）。动词不定式没有人称和数的变化，在句子中不能作谓语。下面我们一起来看一下动词不定式有哪些语法功能。,-,3,2.动词不定式的语法功能：,(1)不定式作主语不定式作主语时，常用it作形式主语，而将作主语的不定式放在句子后部。eg.Itisgoodtohelpothers.帮助他人是好的。ItisexcitingtosurftheInternet.上网是令人兴奋的。,-,4,(2)不定式作宾语学习不定式作宾语时,要注意掌握后接不定式作宾语的动词。常见动词有:want,hope,wish,like,begin,try,need,forget,agree,help等。Manypeopledecidenottothinkaboutit.许多人决定不去考虑这件事。Iwanttogotothelibrary.我想去图书馆。,-,5,(3)不定式作定语不定式修饰名词或代词，起形容词的作用，在句中作定语，放在被修饰对象的后面。请看下列句子：Ihavealotofhomeworktodo.我有很多作业要做。Imhungry.Givemesomethingtoeat,please.我饿了。请给我点吃的吧。,-,6,(4)不定式作状语不定式常常作目的状语、原因状语、结果状语等。不定式作状语时，要注意不定式的逻辑主语应与句子的主语保持一致。IcametoBeijingtoseemygrandpa.我来北京看望我的爷爷。Imgladtomeetyou！很高兴见到你！Imtootiredtowalk.我太累了，走不动了。,-,7,动词不定式的功能5.动词不定式做宾语补足语。动词不定式作宾语补足语，是对宾语的补充说明。常见的动词有：want,tell,wouldlike,choose,allow,ask,invite,help等。注意：（1）以上动词后接不定式做宾语补足语时，若要表达否定意思，要在todo前面加not，构成nottodo的形式。e.g.Mr.Hantoldusnottomaketoomuchnoise.,Grammar:,-,8,（2）有些动词后接不定式做宾语补足语时，可以接不带to的不定式，常见的这类动词有：help,make,let,have,hear,feel,see等。e.g.Hiswordsmadeeveryonelaugh.一感:feel（感觉）二听:listento（听）、hear（听见）三让:let、make、have四看:watch、see、look、notice、observe半帮助:help.因为既可以说helpsbdosth亦可以说helpsbtodosth,-,9,allowsb.todosth.允许某人做某事choosesbtodosth.选择某人做某事wantsb.todosth.想要某人做某事tellsb.todosth.告诉某人做某事asksb.todosth.要求某人做某事invitesb.todosth.邀请某人做某事helpsb.(to)dosth.帮助某人做某事feel/listento/hearsb.dosth.,-,10,(6)不定式作表语不定式还可以作表语。例如：Ourdutytodayistocleanthefloor.今天我们的任务是打扫地板。,-,11,1.Becauseitallowspeople_closertothem.2.Itssad_ofthepandasandotheranimalsindanger.3.Weneed_thembetter.4.Manywildanimalsdonthaveasafeplace_.5.Wewant_animalsindanger.,比一比，看哪组在对话中所找的含有动词不定式的句子最多。,-,12,6.Thatmeanswecangivemoney_protecttheanimals.7.Letsfindoutwhatelsewecando_asmanyasanimalsaspossible.,-,13,1.Scientistsdoalotofresearch_.2.Thegovernmentissettingupnatureparks_.3.TheWWFchosethepanda_.4.TheWWFisworkinghard_.,-,14,Inordertoprotectpandasinthewild,thegovernmentissettingupnatureparksanddevelopingotherplans.,to,“inordertodo”/“todo”referstothepurpose(目的):为了,Thegovernmentissettingupnatureparksanddevelopingotherplansprotectpandasinthewild.,inorderto,-,15,动词分为两类一：谓语动词（一般跟在主语后作谓语）二：非谓语动词（一般跟在谓语动词后）如果是谓语动词，要考虑时态和人称；如果是非谓语动词，要考虑用do/todo/doing.,-,16,todo：want/hope/learn/try/decide/forget/remember/like/love/stop/go/come/plan等inordertodo/todo表目的,do：情态动词、makelethelphadbetter,动词,一般现在时:结构、标志词、用法,一般过去时、过去进行时,现在进行时,谓语动词（主语后）,非谓语动词,doing：practise/enjoy/finish/suggest/keep/like/介词结尾的短语（thinkof/begoodat/dowellinpayattentiontolookforwardto）havetroubledoingspend(in)doing,一般将来时,-,17,-,18,1.Wouldyoupleasetellmenext?A.howdoB.whattodoC.whatdoIdoD.howIshoulddo2.Thegirlwasnttoliftthatbookcase.A.toostrongB.enoughstrongC.strongenoughD.sostrong,一、单项选择。,Practice,-,19,3.Foratimehisgrandmotherfound_accepthisnewidea.A.hardB.ithardC.ithardtoD.hardto4.Asshehasneverbeentherebefore,Illhavesomeone_hertheway.A.showB.toshowC.showingD.showed5.You_driveslowly.Theroadsarewet.A.hadratherB.wouldratherC.hadbetterD.wouldbetter,-,20,7.Intheolddaysitwasdifficultforthepoor_ajob.A.findB.tofindC.lookD.tolookfor,-,21,8.Whenlearningaforeignlanguage,tryyourbest_thespiritofit.A.masterB.holdC.takeholdofD.tomaster9.Itwasfoolish_hiscarunlocked.A.forhimtoleaveB.ofhimtoleaveC.forhimleaveD.himtoleave10.Remember_thenewspaperwhenyouhavefinishedit.A.puttingbackB.putbackC.toputbackD.willputback,-,22,13.Youwerelostonyourwaytothelake,werentyou?Yes,wewereandhadtostop_theway.A.askingB.toaskC.askedD.tobeasked,-,23,二、用所给动词的适当形式填空。,1.Doyouknowwhen_(have)apicnic?2.Sheisverybusytoday.Shehasalotofwork_(do).3.Ourteacheraskedus_(be)carefulwhenwecrossedtheroad.4.Itseasyforus_(answer)thequestion.,tohave,todo,tobe,toanswer,-,24,三、汉译英。1.我们需要更好地保护它们。Weneedtoprotectthembetter.2.许多动物没地方住。Many