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•定语从句两大基本概念：•先行词：??•被定语从句修饰的词叫先行词。•一般由:名词,代词,短语,句子充当•引导词/关系词：??•引导定语从句的词叫引导词。•引导词是区分主句和从句的重要标准。找出句子主干•1.Whenanyoneopensacurrentaccountatabank,heislendingthebankmoneyrepaymentofwhichhemaydemandatanytime,eitherincashorbydrawingachequeinfavorofanotherperson.•2.Ifyou’reunsureaboutthings,eachfloorhasanelected“floorsenior”whoisusuallyastudentintheirthirdorfourthyearofstudywho’sbeenatSmithHouseforawhile.(剑2,T2,L)•3,Asyoucansee,thebuildingyou’reinnowwhichcontainsthismainlounge,thediningroom,therecreationroom,thekitchenandtheofficeswaspartoftheoriginaloldhouse,builtinthe1840stobeusedbythefamilyofGeorgeSmith.(剑2,T2,L)引导词•（1）关系代词：•who，whom，whose，which，that•（2）关系副词：•when，where，why•（3）特殊引导词：•than,but,as,whereby•（4）介词+引导词（1）关系代词：•[练]1994到1995年期间出现了很大的增长，这种情况在未来的几年里很可能还会持续下去。（剑3，T2，W）•[key]•Thereemergedagreatincreasefrom1994to1995,whichlikelycontinuedinthenextyears.•Theyears/periodfrom1994to1995saw/witnessedgreatincreases,whichlikelycontinuedintothefollowingyears.（2）关系副词：①when---时间状语•AprilFool’sDayisthatspecialdaywhenyoushouldplayajokeonsomeone!Children’sfavoritesaretoputsaltinthesugarbowlforDad’smorningcoffeeorputchalkonadeskchairatschoolsotheteachergetsawhitebackside!Butremember,ifyouplayajokeafter12noon,YOUaretheAprilFool!•【练】这是能保证充足食物来源的时候。（剑5，T4，R）•Thisisapointwhenadequatefoodresourceswillbeassured.②where---地点状语•在北京，有一些著名的茶馆，在那里你可以坐下来喝茶，也可以观看到京剧表演节目。（剑3，T3，S）•InBeijingtherearesomefamousteahouseswhereyoucansitanddrinktea,andtheyalsohavethePekingoperashows.Pavarotti,OperaStarFindsCreativePassioninPainting•TenorLucianoPavarottiholdsahandkerchiefwheneverhesingsinconcert.Yetinreallifeheismorelikelytobefoundholdingapaintbrush.Forhisgreatloveispaintingvividly-coloredpicturesofItalianvillagesandseascapes.Whathelikesbestaboutpaintingisitscontrasttoopera,wherethechallengeistouseone’stalentstobringtolifetheworksofothers.“WhenIfinishacanvas,IfeelIhavecreatedaworld.③why----原因状语•Reasonwhy•【练】发生这种变化的一个主要原因就是电视的影响力增大了。(剑3，G，TB，W）•OneofthemajorreasonswhythischangehashappenedistheincreasedinfluenceofTV.•【课堂练习】一（引导词）：•1.Thesearelotsofbusinesspeople___cometoChinatoworkanddobusiness.(剑3,T3,S)•2.Thecouncil,___wasfoundedin1996,certifiesfisheriesthatmeethighenvironmentalstandards,enablingthemtousealabelthatrecognizestheirenvironmentalresponsibility.（剑7,T4,R）•3.Thisismostevidentinphotographicfilm,_____GermanyspendsmuchlessthanBritain.(剑3,T2,W)•4.Sincetheearlyyearsofthetwentiethcentury,_____theInternationalAthleticFederationbegankeepingrecords,therehasbeenasteadyimprovementinhowfastathletesrun,howhightheyjumpandhowfartheyareabletohurlmassiveobjects,themselvesincluded,throughspace.(剑4,T4,R)•5.Theactiontakesplaceinundergroundcities____theenvironmentiscontrolledbycomputers.(剑5,G,TB,R)•6.Thefieldwaslaunched,andtheterm“artificialintelligence”coined,ataconferencein1956byagroupofresearchersthatincludedMarvinMinsky,JohnMcCarthy,HerbertSimonandAlanNewell,allof_____wentontobecomeleadingfiguresinthefield.（剑5,T3,R)【课堂练习】二:改错•1.I’dreallyliketofindafriendthatIcantrusthimcompletely.•2.Long-dayplantsareadaptedforsituationswhererequirefertilizationbyinsects,oralongperiodofseedripening.(剑5,T4,R)•【总结】：引导词的判断原理：•１，先行词•２，从句是否完整•【课后练习】•1.Seaportshavebeentransformedbytheadventofpoweredvessels,____sizeanddraughthaveincreased.（剑2,T2,R）•2.Theareabecameone___thevastmajorityofpeoplelivedinextremepoverty,andsufferedfromappallingsanitaryconditions.（剑6,T1,L)•KEY:whose,where（3）特殊引导词：•1•2•3•4①than先行词是比较级/被比较级修饰【练1/2】退让一步，你会获得比预想还要多的东西。•Byyieldingyougetmorethanyouexpected.【练2/2】Subsidiesforpesticidesandartificialfertilizersencouragefarmerstousegreaterquantitiesthanareneededtogetthehighesteconomiccropyield.(剑3，T2，R）•由于使用农药和化肥可领取政府补贴，农民就不顾实际需要而超量使用，以期取得最高经济作物产量。②but=that````not•Thereisnomanbuthashisfault.•=thereisnomanwhodoesnothavehisfault.•不存在没有过错的人。③as•（1）as---限定（即限制性定语从句）•固定搭配：such,as,thesame+asAtexactlythesametimeasthisnewrealizationofthefinitecharacterofhealth-careresourceswassinkingin,anawarenessofacontrarykindwasdevelopinginWesternsociety.（剑4,T4,R）•就在保健资源是有限的这个新知识被理解的同时，一种相反的观点也在西方社会逐步形成。（2）as----非限定•位置：句首。（句中，句末）•先行词：整个主句。•常见用法：AsIsaidbefore,•AsImentionedbefore,•Asyoucansee,•Aswillbeobserved,④whereby•=bywhich“凭借，借以”•【练】政府可以推行一个体系，让产生更多垃圾的个人和公司支付更多的资金，用于处理垃圾.（剑5,G,TB,W）•Thegovernmentcouldintroduceasystemwherebyindividualsandcompaniesthatproducemorewastemustpaymoremoney,tocoverthecostofdealingwithit.【课堂练习】:•1._____Imentionedbefore,Ithinkthependantbringsmegoodluck.(剑3,T4,S)•2.Familieshavealsoexperiencedchangestheseyears.Morefamiliesconsistofone-parenthouseholdsortwoworkingparents;consequently,childrenarelikelytohavelesssupervisionathome____wascommoninthetraditionalfamilystructure.•A.thanB.thatC.whichD.as•3:填空:•1)___isknowntousall,thewhaleisnotfishbutamammal.•2)___isknowntousallthatthewhaleisnotfishbutamammal.•3)___isknowntousallisthatthewhaleisnotfishbutamammal.•【课后作业】:•1.TheInternetgivesusaccesstomuchmoreinformationinamuchshortertime____isavailablewithconventionalshoppingmethods.（剑3,T4,S）•2.改错：Thebuildingmaybeinaconservationareaornearhousing,inthatcaseitwillbemuchmoredif