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,Story,Amangotonatrainandsatdowninacompartmentwhichwasemptyexceptforonelady.Shetookherglovesoff.Afewhourslaterthewomanwasfounddeadandthemanwasarrestedbythepolice.Theyheldhimfor24hoursandwerethenlegallyforcedtolethimgofree.KEYWORDS:garden,lover,30years,disappear,jail,Thesolutiontothestory,Thirtyyearsbefore,theglovedladyhadbeenmarriedtothemanonthetrain.Sheandherloverhaddisappearedandleftthecountry.Beforevanishingtheyhadcutoffthetwomiddlefingersofherlefthandandburiedtheminthegarden.Thepolicefoundthefingerswhileinvestigatingherdisappearanceandaccusedthemanofmurderinghiswifeandburyingtherestofherelsewhere.Hewasjailedfor30yearsforacrimehehadnotcommitted.Hedidnotrecognizeheratfirstonthetrain.Whenshetookoffhergloveshedid.Hekilledher.Thepolicehadtoreleasehimashehadservedhislifesentencebeforecommittingthecrimeitwasfor.,Sofromthestoryweknowthat,1.Thewomanwhosefingerswerecutoffwasthemanswife.2.Themanwhosewifehadrunawaywithanothermanwasjailedfor30years.,以上是由whose引导的定语从句,而定语从句可归纳为我们今天要讲的句子种类当中的一种.,英语语法:句子的种类,按使用目的可分为陈述句、疑问句、祈使句和感叹句。,1)陈述句(DeclarativeSentences):说明一个事实或陈述一种看法。Lighttravelsfasterthansound.光比声速度快。(说明事实)Thefilmisratherboring.这部电影很乏味。(说明看法)2)疑问句(InterrogativeSentences):提出问题。有以下四种:a.一般疑问句(GeneralQuestions):Canyoufinishtheworkintime?你能按时完成工作吗?b.特殊疑问句(WQuestions;HQuestions):Wheredoyoulive?你住那儿?Howdoyouknowthat?你怎么知道那件事?,c.选择疑问句(AlternativeQuestions):Doyouwantteaorcoffee?你是要茶还是要咖啡?d.反意疑问句(Tag-Questions):Hedoesntknowher,doeshe?他不认识她,对不对?3)祈使句(ImperativeSentences):提出请求,建议或发出命令,Sitdown,please.请坐。Dontbenervous!别紧张!4)感叹句(ExclamatorySentences):表示说话人惊奇、喜悦、愤怒等情绪,Whatgoodnewsitis!多好的消息啊!,(二)句子按其结构可以分为以下三类:简单句,并列句,主从复合句,1)简单句(SimpleSentences):只包含一个主谓结构句子叫简单句,Sheisfondofcollectingstamps.她喜欢集邮。(主)(谓)2)并列句(CompoundSentences):包含两个或两个以上主谓结构的句子叫并列句,句与句之间通常用并列连词或分号来连接,例如:Thefoodwasgood,buthehadlittleappetite.(主)(谓)(主)(谓)食物很精美,但他却没什么胃口。,3)复合句(ComplexSentences):包含一个主句从句和一个或几个从句的句子叫复合句,从句由从属连词引导Thefilmhadbegunwhenwegottothecinema.主句从句我们到达电影院的时候,电影已经开演了。,(三)基本句型(BasicSentencePatterns):英语中千变万化的句子归根结底都是由以下五种基本句型组合、扩展、变化来的:,I句子成分句子的组成成分叫句子成分。在句子中,词与词之间有一定的组合关系,按照不同的关系,可以把句子分为不同的组成成分。句子成分由词或词组充当。英语的基本成分有六种:主语(subject)、谓语(predicate)、表语(predicative)、宾语(object)、定语(attribute)和状语(adverbial),II基本句型,基本句型一:(主谓)Imstanding.基本句型二:(主谓表)Thedinnersmellsgood.基本句型三:(主谓宾)Whoknowstheanswer?基本句型四:(主谓间宾直宾)Hebroughtyouadictionary.基本句型五:(主谓宾宾补)sawthemgettingonthebus.,注意:以上只是五个基本句型,但是我们在阅读中碰到的是更为复杂的句子。英语中任何复杂的句子都是在这五个句型上的延伸。下面以基本句型五为例的一个句子来扩充一个基本句型。通过加上适当的定语,状语等,我们可以使句子更血肉丰满:注意:定语:定语对名词或代词加以修饰或限定。状语:状语主要修饰动词、形容词或副词。,Wefoundthehallfull.我们发现礼堂坐满了。Wefoundthegreathallfullofstudentsandteachers.我们发现大礼堂坐满了学生和教师。Wefoundthegreathallfullofstudentsandteacherslisteningtoanimportantreport.我们发现大礼堂坐满了在听一个重要报告的学生和教师。WefoundthegreathallfullofstudentsandteacherslisteingtoanimportantreportmadebyacomradefromthePeoplesDailyoncurrentaffairsinEastEurope.我们发现大礼堂坐满了在听人民日报的一位同志作有关东欧局势的重要报告的学生和教师。,1、简单句不管是我们阅读还是写作,构造和理解简单句都是最基本的技能。在这个技能中,记住一点是十分重要的。也就是说:在英语简单句中,只能有而且(一般情况下)必须有一个谓语部分。英语的简单句只有五种基本句型,也就是我们上面提到的五中基本句型,所有的英语句子都不能离开这五种基本句型,所以我们把它们谙熟于心是非常重要而且大有裨益的。再重复一下,这五种句型是:SV,SVC,SVO,SVOC,SVOiOd。其中S=Subject,也就是主语;V=Verbalphrase,也就是谓语部分;C=Complement,表示跟在系动词之后的补语;O=Object,也就是句子的宾语,在最后一种句型中包括间接宾语和直接宾语。,2、并列句(compoundsentence),英语的并列句一般情况下引不起巨大的阅读障碍,因为在分句之间往往有固定的连接词说明前后分句的关系。这样的连接词有以and为代表的表示意义延伸的并列连词、以or为代表的表示选择概念的并列连词、以but为代表的表示转折的并列连词和表示原因的for四个类型。对此我们分别举例句来说明问题:,第一种and型,(and,bothAandB,notonlyAbutalsoB,neitherAnorB)1.Thecameratakesgoodpictures,andthepriceisreasonable.2.Hedoesntcareformoney,nordoeshecareforfame.第二种or型(or,either.or)1.Thechildrencangowithus,ortheycanstayathome.2.Takeamapwithyou,oryouwillbelost.,第三种but型(but,while)1.Hedoesntearnmuch,buthespendsmoneyfreely.2.Somepeoplewastefood,whileothershavenone.第四种for型1.Hemusthavedonesomethingwrong,fortheteachercalledhimtotheoffice.2.Itmusthaverainedlastnight,forthegroundiswet.,3、复合句(complexsentence),如果一个句子充当另一个句子的组成部分,如主语、宾语、表语、同位语、定语、状语等,具有这样结构的句子称为主从复合句。充当某一成分的句子称为从句,带着从句的句子称为主句。从句对主句的关系是从属关系。主句和从句之间有一定的连接词加以连接。从属关系的复合句包括名词性从句(NominalClauses)(包括主语从句、表语从句、宾语从句、同位语从句)、定语从句(RelativeClauses)、状语从句(AdverbialClauses)。下面我们分别来探究一下什么是名词性从句,定语从句,状语从句。,4.名词性从句:在句子中充当主语、宾语、表语与同位语的句子分别叫做主语从句、宾语从句、表语从句和同位语从句,这些从句统称为名词性从句。,(一)主语从句在复合句中用作主语的从句叫主语从句。Thatyouareleavingisapity.你要走,真遗憾。Whatmattersishowyoulive.重要的是你如何生活。Wherehelivesisnotclear.他住哪儿不清楚。Whowillstaymakesnodifference.谁留下来都一样。Whetherthefootballgamewillbeplayeddependsontheweather.足球比赛是否举行将视天气而定,注意:(三大点),主语从句中的连接词的问题从属连词that,whether连接代词who,whom,whose,which,what连接副词when,where,how,whya.所有wh-疑问词引导的主语从句不仅起连接主句与从句的作用,而且还在从句中担任各类成分及具有词汇意义,而that在从句中仅起连接作用,没有词汇意义,但that引导主语从句时,that不可以省.b.主语从句表示是否只能用whether引导。主语从句的语序是陈述句的语序,it作形式主语的问题大部分主语从句都可以用it作形式主语,这主要是为了保持句子平衡,主语从句常用it作形式主语,将主语从句后置。用it作形式主语的主语从句结构有如下几种:,a.Itis+名词+that从句ItisafactthatEnglishisbeingacceptedasaninternationallanguage.英语正在被人们接受为一种国际语言,这是一个事实。b.Itis+形容词+that从句1.Itiscertainthatshewilldowellinherexam.毫无疑问她考试成绩会很好。,虚拟语气Itisimportant,natural,necessary,funny,strange,surprising,apity,ashame,nowonderetc.+that从句的句型也可归为a.Itis+名词+that从句b.Itis+形容词+that从句的句型中,谓语部分常用should+动词原形,should常被省略。1.Itisimportantandnecessarythatwe(should)keepthebalanceofnature.我们要维持生态平衡,这是重要而且必不可少的。2.Itisapitythatyou(should)misssuchagoodchance.真遗憾你竟然失去这么好的机会。,c.It+动词+that从句1.ItseemsthatAliceisnotcomingtothepartyatall.艾丽丝似乎不来参加晚会。2.IthappenedthatIwasoutthatday.碰巧我那天外出了。(=Ihappenedtobeoutthatday.)d.Itis+过去分词+that从句1.ItissaidthatMr.GreenhasarrivedinBeijing.(=Mr.GreenissaidtohavearrivedinBijing.)据说格林先生已经到了北京。2.ItisreportedthatChinahassentanotherman-madeearthsatelliteintoorbit.据报道中国又成功地发射了一颗人造地球卫星。,下列使用虚拟语气的主语从句也可归在这一类Itis+过去分词+that从句在Itissuggested,ordered,requested,insisted,etc.+that从句中,谓语部分用should+动词原形,should常被省略。1.Itissuggestedthatwe(should)dotheexperimentasecondtime.有人建议我们再做一次实验。,用形式主语it引导的主语从句相当多,有些已形成固定的语法和译法。常见的有:Itissaidthat.据说Itisreportedthat.据报导Itiswellknownthat.众所周知Itisannouncedthat.据宣布Itisbelievedthat.人们相信Itisthoughtthat.人们认为,Itisunderstoodthat.自不待言Itmustbepointedoutthat.必须指出Itmustbeadmittedthat.必须承认其他情况Itdoesntmatterwhethershewillcomeornot.她是否来这无关紧要。Itmakesnodifferencewhereweshallhavethemeeting.我们在哪里开会毫无区别。Itsuddenlyoccurredtoherthatshehadforgottentolockthedoor.她突然想到她忘记锁门了。,并且当that引导的主语从句出现在疑问句中时,宜用it作形式主语,而把主语从句后置。1.Isitpossiblethattheymaycompletethetaskaheadoftime?他们有可能提前完成任务吗?2.Doesitmattermuchthathewontbeabletocometomorrow?他明天来不了很要紧吗?此外连接代词what,whoever,whatever,whichever引导的主语从句出现在疑问句中时等引导的主语从句不宜用it作形式主语。1.Iswhathetoldusreallytrue?他所告诉我们的的确是真的吗?,(二)宾语从句宾语从句TheObjectClause,在复合句中作主句的宾语,它属于名词性从句。它可以作主句谓语动词的宾语,也可以作介词的宾语。连接词(引导词)相同于主语从句从属连词that,if,whether连接代词who,whom,whose,which,what连接副词when,where,how,why语序:从句的词序用陈述语序(主+谓),虚拟语气在宾语从句中的用法.suggest,order,request,require,demand,insist,askthatshoulddoTheteachersugggestedthatweshouldcarryouttheplanasquicklyaspossible.,使用宾语从句还有一个要注意的问题是在think,believe,suppose,expect等动词所跟的宾语中,如果从句谓语是否定的,一般要将否定词移到主句谓语上,而将从句的谓语变为肯定形式。1).Idontthinkhehastimetoplayfootballwithyou.我想他没有时间和你踢足球。2).Idontsupposeitistherushhouryet.我估计现在未到(交通)高峰时间。,(三)表语从句表语从句放在连系动词之后,充当复合句中的表语。,1可接表语从句的连系动词有be,look,seem,sound,appear等。1)Chinaisnolongerwhatsheusedtobe.今日的中国不再是过去的中国了。2)Thequestionremainswhethertheywillbeabletohelpus.问题还是他们能否帮我们。,注意,连接词表语从句中的连接词如主语从句,宾语从句,但是同主语从句一样,连词that引导的表语从句中that不可以省,表语语从句表示是否只能用whether,使用虚拟语气的表语从句在表示建议、劝告、命令含义的名词后的表语从句,谓语动词需用should+动词原形表示,should可省略。常见的词有:advice,suggestion,order,proposal,plan,idea等。1)Mysuggestionisthatwe(should)startearlytomorrow.我的建议是我们明天一早就出发。2)Hisproposalwasthatthey(should)challengetheotherclassestoafriendlycompetition.他的提议是挑战别的班级进行一场友谊竞赛。,(四)同位语从句同位语从句用于对前面的名词作进一步解释,说明名词的具体内容。同位语从句一般由that引导,但也可以由whether以及连接代词和连接副词引导。,1同位语从句一般跟在名词的后面同位语从句一般跟在名词fact,hope,idea,news,doubt,suggestion,information,opinion,decision,discovery,truth,promise,statement,problem,rule等后面。,注意,同位语从句一般跟在名词的后面同位语从句一般跟在名词fact,hope,idea,news,doubt,suggestion,information,opinion,decision,discovery,truth,promise,statement,problem,rule等后面。,1)Theywereallverymuchworriedoverthefactthatyouweresick.对你生病这件事,他们都很焦虑。2.Heaskedmethequestionwhetherhecouldleaveatfive.他问我一个问题他是否能在五点离开.3)Wehaventyetsettledthequestionwherewearegoingtospendoursummervacation.到哪儿去度暑假,这个问题我们还没有决定。,使用虚拟语气的同位语从句在一些表示“建议、命令、要求”的名词后的同位语从句中,谓语动词用should+动词原形,should可省略。,Thisisouronlyrequestthatthis(should)besettledassoonaspossible.尽快解决这个问题,这是我们唯一的请求。Hemadethesuggestionthatwe(should)gobytrain.他建议我们坐火车去。,名词性从句练习1Canyoumakesure_thegoldring?A.whereAlicehadputB.wherehadAliceputC.whereAlicehasputD.wherehasAliceput2._somemammalscametoliveintheseaisnotknown.A.WhichB.AlthoughC.SinceD.How3Theoldgentlemanneverfailstohelp_isinneedofhelp.A.whomB.whoC.whoeverD.whomever4.Theyoungcouplewereanxiousandtheybeggedthedoctortodo_hecouldtosavetheirdaughterslife.A.thatB.whatC.allwhatD.which5.ThenewlawwillcomeintoeffectonNovember1_nochildrenunder18willbeallowedtobuyeitherwineorcigarette.A.whetherB.becauseC.thatD.when,D,D,C,B,C,6.Mothermadeapromise_Ienteredakeyschool,shewouldtakemetoBeijing.A.thatB.thatifC.ifD.whether7.Heaskedmethequestion_hecouldleaveatfive.A.ifB.whetherC.thatD.when8.Itisnatural_weshouldgotherebyair.A.thatB.becauseC.howD.if9.Thebossordered_himwhilehewaswritingthereport,becausehewastomakeaspeechthenextday.A.usnotdisturbB.thatwenotdisturbC.thatwewouldnotdisturbD.thatwecouldnotdisturb,B,B,A,B,10.Aftertenyearsofdevelopment,PudongNewAreaisnot_itusedtobe.Infact,ithasbecomethemostattractingareainShanghai.A.whichB.WhatC.thatD.when11.Itdependsonitsqualityandprice_anewproductsellswell.A.ifB.whetherC.whatD.that12.Theyounggirlswemetinthestreetcornerseemedtobefrightened.Whatdoyouthink_madethemso?A.whichB.WhatC.thatD./13.Iwontbelieve_yousay.A.nomatterwhatB.whateverC.nomatterhowD.whenever,B,B,D,B,状语从句(AdverbialClause)从句用作状语称为状语从句。根据用途,状语从句可分为时间、地点、原因、条件、方式、让步、结果、目的、比较等状语从句。,(一)时间状语从句时间状语从句表示时间,常用的关联词有when,until,as,after,before,once,since,assoonas,whenever,nosoonerthan,hardly/scarcely/barelywhen,themoment,everytime等等。1)Whenyoucrossamainroad,youmustbecareful.2)Theinstanthesawthebuildingonfire,hedialed999.3)HardlyhadhearrivedinBeijingwhenitbegantosnow.,(二)地点状语从句地点状语从句表示地点,常用的关联词有where,wherever等。1)Putitwhereyoufoundit.2)Sitdownwhereveryoulike.,(三)原因状语从句原因状语从句表示原因或理由,常用的关联词有because,as,since,for,nowthat,consideringthat(由于考虑到)等。1)Ieatice-creamsomuchbecauseIlikesweetfood.2)Consideringthathedidnotstudy,hedidwellonthetest.3)Sinceyouwonthelpme,Illasksomeoneelse.,(四)条件状语从句条件状语从句表示真实的或现实的条件,引导从句所用的关联词有if,unless,suppose,incase(that),intheevent(that),as(so)longas,provided/providingthat,onconditionthat等等。1.Ifitsnowstomorrow,wewillbuildasnowman.2.Youllbelate,unlessyouhurry.,3.Supposewearelate,whatwillhesay?(suppose从句必须放在主句之前)我们如果迟到了,他会说什么?4.Intheeventthatourteamwins,therewillbeaparty.5.Incaseitrains,donotexpectme.如果下雨,就不要等我了。6.Hewilldoanythingas(so)longasitisinteresting.只要好玩,他什么都愿意做。,(五)方式状语从句方式状语从句表示动作的方式,回答How的问题,常用关联词as,asif,asthough,theway(that),intheway(that)等引导,一般置于主语之后。1.DoasIsay.Ididjustasyoutoldme.照我说的去做。我就是照你说的去做的。2.Heactsasif/asthoughheweretheowner.他行为举止好象是这儿的主人似的。3.TheydiditinawaythatIhadneverseenbefore.他们以我从没见过的方式行事。4.IwasneverallowedtosingthewayIwantedto.我从未被允许用自己想用的方式唱歌。,(六)让步状语从句让步状语从句表示“虽然、尽管、即使”等概念,使句子具有对比的因素。常用的关联词有although,though,evenif,eventhough,whether,as,however,while,nomatter+特殊疑问词,特殊疑问词+ever1)Althoughyoufeelveryillrightnow,thisisstillacommondisease.2)WeintendtogoU.S.,evenifairfaresareexpensive.3)Iwouldntgotoseethenewmovienomatterwhorecommendsit.,(七)结果状语从句结果状语从句表示结果,常由连词sothat,such(a/an)that,sothat,suchthat等引导,置于主语之后。1)Shewassofrightenedaboutthedogthatshecried.2)Thenewsworriedhimsomuchthathedidntsleepatallforthewholenight.3)Wearrivedearly,sothatwegotgoodseats.,(八)目的状语从句目的状语从句表示目的,回答whatfor或forwhatpurpose的问题,常用关联词sothat,inorderthat,lest等引导,一般置于主语之后。目的状语从句中的谓语动词常由“情态动词+动词原形”构成1)Wearrivedearlysothatwecouldgetgoodseats.2)Shipscarrylifeboatssothatpeoplecanescapeiftheshipsinks.3)Theywrotethenoticeinseverallanguagessothatforeignerscouldunderstandit.,(九)比较状语从句常用的关联词有as,than,asas,notsoas,themorethemore1)Airistomenaswateristofish.2)Themorecivilizedamanbecomes,thelessheislimitedbythedisadvantageofhisenvironment.,1IllgowithyouassoonasI_mywork.A.willfinishB.shallfinishC.finishD.finished2Nosooner_thenewsthantheyrushedoutintothestreet.A.theyheardB.theyhadheardC.didtheyhearD.hadtheyheard3Althoughheisconsideredagreatwriter,_A.hisworksarenotwidelyreadB.buthisworksarenotwidelyreadC.howeverhisworksarenotwidelyreadD.stillhisworksarenotwidelyread4_hemight,hefailed.A.TryasB.AstryC.TriedasD.Astried,C,D,A,A,5.Itwaslong_theyfindoutwhathadhappened.A.untilB.whenC.sinceD.before6.Wehadntmetfortwentyyears,butIrecognizedher_Isawher.A.themomentB.themomentwhenC.forthemomentD.atthemomentwhen7._difficultieswemaymeetwith,wearesuretogetoverthem.A.HoweverB.WhateverC.NomatterhowD.Though,D,A,B,8.Itwas_thatweallfeltlikegoingswimming.A.sofinedayB.suchfineweatherC.suchfinedayD.sofineweather9.Medicineshouldbekept_childencantreachit.A.becauseB.sothatC.whenD.where10.ThemoreyoupracticespeakingEnglish,_itwilldoyou.A.thebetterB.themoreC.themoregoodD.thebettermuch,B,D,C,定语从句(AttributiveClauses)在句中做定语,修饰一个名词或代词,被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后,由关系词(关系代词或关系副词)引出。关系代词有:who,whom,whose,that,which等。关系副词有:when,where,why等,(一)关系代词引导的定语从句关系代词所代替的先行词是人或物的名词或代词,并在句中充当主语、宾语、定语、表语等成分。,1)先行词指人,关系代词用who,whom,that,这些词代替的先行词是人的名词或代词,在从句中所起作用如下:1.Ishethemanwho/thatwantstoseeyou?他就是你想见的人吗?(who/that在从句中作主语)2.Heisthemanwhom/thatIsawyesterday.他就是我昨天见的(whom/that在从句中作宾语),2)先行词指物,关系代词用which,that,它们所代替的先行词是事物的名词或代词,在从句中可作主语、宾语等,Thepackage(which/that)youarecarryingisabouttocomeunwrapped.你拿的包快散了。(which/that在句中作宾语),3)Whose用来指人或物,(只用作定语,若指物,它还可以同ofwhich互换),Theyrushedovertohelpthemanwhosecarhadbrokendown.那人车坏了,大家都跑过去帮忙。请递给我那本绿皮的书Pleasepassmethebookwhosecoverisgreen.=Pleasepassmethebokthecoverofwhichisgreen.=Pleasepassmethebookofwhichthecoverisgreen.,4)只能用that作为定语从句的关系代词的情况a)在there/herebe句型中,只用that,不用which。Hereisthepaperthatyouleftbehindtheotherday.b)在不定代词,如:anything,nothing,theone,all,much,few,any,little等作先行词时,或先行词被all,every,few,little,much,some,any,no等修饰时,只用that,不用which。IsthereanythingthatIcandoforyou?Thereisnodifficultythatwecantovercome.,c)先行词有theonly,thevery修饰时,只用that。ThisistheverylaptopthatIamdyingfor.d)先行词为序数词、数词、形容词最高级时,只用that。ThisisthecoolestcellphonethatIhaveeverseen.e)先行词既有人,又有物时,只用thatTheytalkedforhalfanhourofthingsandteachersthattheyrememberedintheschool.f)有时为了避免重复,我们选用thatWhoistheuglywomanthatisstandingovertherewithThewhitehat?g)当关系代词在限制性定语中作表语时,我们只用thatIamnotthegirlthatIusedtobe.,(二)关系副词引导的定语从句先行词是指时间、地点或理由的名词,引导词可用关系副词并在从句中作状语。,1)when,where,why是关系副词,它们的含义相当于介词+which结构,因此常常和介词+which结构交替使用.Thereareoccasionswhen(onwhich)onemustyield.任何人都有不得不屈服的时候。Beijingistheplacewhere(inwhich)Iwasborn.北京是我的出生地。Isthisthereasonwhy(forwhich)herefusedouroffer?这就是他拒绝我们帮助他的理由吗?,2)怎样判断关系代词与关系副词方法一:用关系代词,还是关系副词完全取决于从句中的谓语动词。及物动词后面跟宾语,就必须要求用关系代词;而不及物动词后不跟宾语,则要求用关系副词。ThisisthemountainvillagewhereIstayedlastyear.IllneverforgetthedayswhenIworkedtogetherwithyou.习惯上总把表地点或时间的名词与关系副词where,when联系在一起。方法二:准确判断先行词在定语从句中的成分(主、谓、宾、定、状),也能正确选择出关系代词/关系副,例1.Isthismuseum_youvisitedafewdaysage?A.whereB.thatC.onwhichD.theone2.Isthisthemuseum_theexhibitionwasheld?A.whereB.thatC.onwhichD.theone例1变为肯定句:Thismuseumis_youvisitedafewdaysago.例2变为肯定句:Thisisthemuseum_theexhibitionwasheld.,D,A,所以关系词的选择依据在从句中所做的成分,先行词在从句中做主、定、宾语时,选择关系代词(who,whom,that,which,whose);先行词在从句中做状语时,应选择关系副词(where地点状语,when时间状语,why原因状语)。,(三)限制性和非限制性定语从句1)定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分,去掉它主句意思往往不明确;非限制性定语从句是先行词的附加说明,去掉了也不会影响主句的意思,它与主句之间通常用逗号分开,Thisisthehousewhichweboughtlastmonth.这是我们上个月买的那幢房子。(限制性)Thehouse,whichweboughtlastmonth,isverynice.这幢房子很漂亮,是我们上个月买的。(非限制性),2)非限制性定语从句除了能修饰一个先行词外,还能将整个主句作为先行词,对其进行修饰,这时从句谓语动词要用第三人称单数,关系代词多用which或as.HeseemsnottohavegraspedwhatImeant,whichgreatlyupsetsme.他似乎没抓住我的意思,这使我心烦。Liquidwaterchangestovapor,whichiscalledevaporation.液态水变为蒸汽,这就叫做蒸发。,注意:as,which引导非限定性定语从句,相当于andthis或andthat,As一般放在句首,which在句中。Asweknow,smokingisharmfultooneshealth.Thesunheatstheearth,whichisveryimportanttous.as可引导非限制性从句,常含有正如的意思。Asweknow,smokingisharmfultooneshealth.Asisknown,smokingisharmfultooneshealth.,而as引导定语从句时,可指人或物,通常与thesame,such,so,as等连用。如:1.Suchaccidentsasyoudescribewillneverhappenagain.2.Asmanymembersaswerepresentagreedtotheplan.,(四).先行词和关系词二合一我们还会碰到一些先行词和关系词合二为一的情况,如:1)Whoeverspitsinpublicwillbepunishedhere.(划线部分为主语从句但Whoever可以用anyonewho代替,因此Anyonewhospitsinpublicwillbepunishedhere.中,划线部分又成了定语从句)2)Theparentswillusewhattheyhavetosendtheirsontotechnicalschool.(what可以用allthat代替)还有如what=thethingthat;whatever=anythingthatwho=thepersonthatwhoever=anyonewho(错)Whobreaksthelawwillbepunished.(错)Whoeverrobbedthebankisnotclear.(对)Whoeverbrea

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