新概念第二册第21课完整ppt课件

精选ppt,Lesson21Madornot?,精选ppt,Newwords,1madmda.发疯2reasonri:znn.原因3sumsmn.量4determineddit:minda.坚定的，下决心的,精选ppt,madadj发疯的,1.bemad发疯，发狂（强调状态）2.“为而疯狂（着迷）”的表示方法：bemadaboutImmadaboutEnglish.becrazyaboutgomad发疯，发狂（强调转变）gocrazygoinsane（insaneinseinadj.患精神病的，精神病患者的，极愚蠢的）gobananas（go+adj.变得)Theyaregoingbananas.=goingcrazy=goingmad(变疯了)Islowlygoinsane/gocrazy/gomad/gobananas.3.bemadatsb生某人的气4.drivesbmad逼疯,精选ppt,reason,1)n.原因forthisreason由于这个原因Forthisreason,Iwaslate.由于这个原因，我迟到了。forsomereason由于某个原因(some:某一个，加可数名词单数)giveareason提出理由therootreason根本原因thereasonisthat理由是thereasonwhyisthat的理由是eg.ThereasonwhyIstudyEnglishisthatIenvythosewhospeakEnglishwell.我学习英语的理由是我羡慕那些讲英语很好的人。,精选ppt,2)理性，正常心智eg.Onlymanhasreason.只有人类才有理性。loseonesreason丧失理智beyondallreasons毫无道理bringapersontoreason使（某人）明白道理，使不做糊涂事reasonableadj.合情合理的，良好的，尚可的atareasonableprice以合理的价格cause导致某事发生的起因thecauseofthefire大火的起因eg.Smokingisoneofthecausesoflungcancer.吸烟是肺癌的起因之一。,精选ppt,sumn.量,alargesumof:大量的，喜欢跟钱连用一大笔钱alargesumofmoney,精选ppt,sumn.量,表“许多”的短语：agreatmany+pl.agreat/largenumberof+pl.anamountof(money)a(large)sumof(money)修饰货币n.大意，要旨thesumofaspeech演讲大意sumup(1)合计sumupalltheexpenses把所有的花费加起来(2)总结，概括eg.Tosumup,heagreeswithus.总的来说，他同意我们的观点。insum=inaword/inshort/inbrief总之，要言之,精选ppt,determinedadj坚定的，下决心的,determinevt.决定，确定，影响determineadateforameeting确定开会的日期determineonsth决定做某事determinetodostheg.WedeterminedtostudyEnglishhard.我们决定要努力学习英语。bedeterminedtodosth.下决心做某事eg.Iamdeterminedtostayhere.我决定留下来。表示下决心做某事，句型知多少？makeuponesmindtodosthdecidetodosthmakeadecisiontodosth,精选ppt,课文讲解,Madornot?,1、Madornot?=madornotmad?ornot在疑问词的后面，表示“是还不是”，选择概念2、Aeroplanesareslowlydrivingmemad.1).aeroplane=airplane飞机2).drivesbmad把某人逼疯（难点P94)e.g.Youaredrivingmemad.drive(drove,driven)eg.Hedriveshiscarverybadly.他开车技术非常糟糕。eg.Thefarmerdrovethecattleinthefield.那位农夫把牛赶进田里。eg.Ourarmydrovetheenemyback.我们的军队把敌人赶回去了。eg.Duringthewar,manypeopleweredrivenoutoftheirhomes.战争期间，许多人被赶出家园。,3、Ilivenearanairportandpassingplanescanbeheardnightandday.nightandday日日夜夜，夜以继日passingplanes过往飞机（passing是现在分词，作定语，起形容词作用，修饰planes，“经过的(路过)，过往的”）Heforgotthemanwithpassingtime.随着时间的消逝，他忘掉了那个人。sleepingbaby正在睡觉的小孩waitingcar正在等待的车,精选ppt,4、Theairportwasbuiltyearsago,butforsomereasonitcouldnotbeusedthen.1)years前面不加确定的数词时，一般表示“许多年”yearsago=manyyearsago，weeks等的用法与它相似Ihavenotseenhimforweeks.2)forsomereason由于某个理由some+可数名词单数：某一somebooksome+可数名词复数：一些somebookssome+不可数名词：一些somewaterIlltellyousomeday.Welltalkaboutitsomeothertime.我们改日再谈这件事。,5.Lastyear,however,itcameintouse.Overahundredpeoplemusthavebeendrivenawayfromtheirhomesbythenoise.1)comeintouse:投入使用(永无被动，物作主语）comeinto:进入得到、获得财富eg.Theairportcameintouselastyear.这个机场去年投入使用。gooutofuse停止使用2)over=morethan3)awayfrom离开4)Home,family与house的区别（P94难点）home:家,强调有感情;house仅仅指房子;family:家人home=family+housemusthavedone对发生完的事情有把握的判断musthavebeendone（被动形式）,6.Iamoneofthefewpeopleleft.SometimesIthinkthishousewillbeknockeddownbyapassingplane.1).oneof的用法（3点）+名词复数+谓语动词的单数+形容词的最高2）left表示被留下来的，leave-left-left,left作定语后置,常放n.后.left剩下的东西，相当于“Whoareleft(bytheothers)其他人走了留下他们”Ihaveabagleft.Thereistencentsleftinmypocket.（centsentn.(货币单位)分,分币）3)sometimes有时候sometime（过去或将来）某时候sometime一段时间sometimes几次，几倍（注：这是中国人的用法，地道的说法是：severaltimes）4）knockdown拆散，撞倒knockat敲knockout打昏knockoff下班；从碰下去；优惠，折扣knockover撞翻，打翻，撞倒,精选ppt,Ihavebeenofferedalargesumofmoneytogoaway,butIamdeterminedtostayhere.offerv.提供（相当于given）offerhelp提供帮助offerasumofmoney提供一笔钱offerajob提供一份工作offersbsthoffersthtosb双宾语的被动语态中，主语有两种可能;以sb.做主语或以sth.做主语givesb.sth.被动sb.begivensth.givesth.tosb.被动sth.begiventosb.双宾语在变被动时用离动词最近的宾语做主语原文句型结构sb.beofferedsth.bedeterminedtodosth下定决心要做,7.EverybodysaysImustbemadandtheyareprobablyright.1）Everybody不定代词作主语谓语动词用单数2）mustbe表对现在事实的肯定推测,精选ppt,动词语态英语动词有两种语态主动语态：主语是动作的执行者被动语态：主语是动作的承受者ManypeoplespeakEnglish.(主动语态)Englishisspokenbymanypeople.(被动语态),精选ppt,被动语态构成,助动词+及物动词的过去分词（be+P.P.),精选ppt,以see为例，比较主动语和态被动语态的结构形式,精选ppt,肯定句，否定句及疑问句如下。,CarsaremadeinChangchun.CarsarenotmadeinChangchun.-ArecarsmadeinChangchun?(-Yes,theyare./No,theyarent.)Wherearecarsmade?p26,精选ppt,被动语态使用方法,Whencanweusethepassivevoice?不知道动作的执行者是谁，或没有必要指出动作的执行者时。Mybikewasstolenlastnight.Lettersarecollectedateighteverymorning.2.为了强调或突出动作的承受者时。ThedeskwasmadebyMasterWang.Thebagwastakenawaybyhissister.,精选ppt,3.为了更好地安排句子Thewell-knownpersongotonthebusandwasimmediatelyrecognizedbypeople.（一个主语就够了）4.在上下文中，为了使句子间连接紧密时。如：Ihaveanewskirt.Itwasgiventomeasabirthdaypresentbymyaunt.,精选ppt,主动语态改为被动语态的方法,将主动语态的宾语改为被动语态的主语。将主动语态的谓语动词改为“be+过去分词”结构。将主动语态的主语改为介词by之后的宾语，放在谓语动词之后（有时可省略）。,精选ppt,将下列句子改成被动语态。,1.WeuseEnglishasaforeignlanguage.Englishisusedasaforeignlanguage(byus)2.PeoplewritebusinesslettersinEnglishBusinesslettersarewritten(bypeople)inEnglish.3.TheymaketelephonecallsinEnglish.Telephonecallsaremade(bythem)inEnglish.4.TravelersandbusinesspeopleuseEnglish.Englishisusedbytravelersandbusiness.5.FarmersgrowriceinZhejiang.RiceisgrownbyfarmersinZhejiang,精选ppt,主动语态变为被动语态时注意,含直接宾语和间接宾语的主动语态变为被动语态时有两种情况:EgHegavetheboyanapple.(1)把间接宾语改为主语,直接宾语保留不变:Theboywasgivenanapple(2)把直接宾语改为主语,此时,间接宾语前要加to或for.Anapplewasgiventotheboy.(give,pass,show,send-to)(buy,draw,make,-for),精选ppt,1.含双宾语的被动Myfathergavemeanewbookonmybirthday.-Anewbookwasgiventome(bymyfather)-Iwasgivenanewbook(bymyfather).2.不带的to不定式,改为被动语态时不定式前要加to.Theywatchedthechildrensing.Thechildrenwerewatchedtosing.3.短语动词是不可分割的整体,改为被动语态时要保持其完整性,介词或副词不可遗