高中英语语法之从句篇(简单,实用,短期内搞定英语从句) 26页

一•名词性从句名词性从句相当于名词，一个从句在整个句子中充当名词的作用，它可以作为主句的主语、表语、宾语和同位语。名词性从句主要分为四种:主语从句，表语从句，宾语从句同位语从句1.Whowillwinthematchisunknown.2.Iwanttoknowwhathehastoldyou.3.Thefactisthathehadwonthegame.4.Thenewsthatwewonthegameisexciting.（一）宾语从句宾语从句在复合句中做及物动词的宾语，或用作介词和某些表示心理活动的形容词后作宾语，或是用it作为形式宾语代表宾语从句。例：1.Ithinkthatitwillbeofnouse.2.Itdependsonwhetherthebosswillagreetoyouornot・宾语从句的连接词：that,（常用且一般可省略）who,what,whether/if（是否）which,whoever,whatever,when,where,how,why.（连接词的选择要看从句的具体意思需要）仮!J：1.Iknowthatyouarcateacher・2.Iwonderif/whetheryouareMrLi.3.DoyouknowwhatIwi11donext?4.Icanguesswhichteamwillwin.5.Idon"tknowwhenhewillcome・6.Idon"tknowwherehehasgone・7.Theydon"tknowhowtheyshouldhelpme. 2.Pleasegivethebooktowhoeverlikesit.Attention:①★宾语从句的语序一定是正常的语序，即陈述句的语序，先主语后谓语。Idon"tknowwhoarcyou.（X）Idon"tknowwhoyouare・（V）②★从句的时态需跟主句相配合。主句为一般现在时，从句可根据需要选择各种时态；主句为一般过去时时，从句通常用过去的时态。③★介词后的宾语从句，引导词一般不用which,if,that,但可用what（常用,常常是充当从句的主语，宾语或表语）,how,whether等引导。④★that在所有的名词性从句中都不充当成分，在宾语从句中that可以省略。（二）主语从句1.Whosewatchwaslostisunknown.2.Whatweneedistime・3.Whomwemuststudyforisaquestionofgreatimportance・4.Whetherwewillgoforanoutingremainsunknown.5.Thathefinishedwritingthecompositionsurprisedusall.1・主语从句的连接词：1）从属连词（从句中不充当成分，只起连接作用）：that,whether等.that引导主语从句只起引导作用，本身无意义，在主语从句中不充当任何成分,但不能省略。注意：已确定的事由that引导；没决定的事由whether引导.Thathewillcomeiscertain.Whetheritwillpleasethemisnoteasytosay.2）连接代词（在从句中充当主语，宾语，或表语）who,what,which,whatever,whichever,whoever Whatseemseasytosomepeopleseemsdifficulttoothers・Whichsidewillwinisnotclear・Whoevercomesiswelcome・WhateverIhaveisyours・3）连接副词when（从句中作时间状语）where（从句中作地点状语）how（从句中作方式状语）why（从句中作原因状语）Whyhediditremainsamystery.Whentheywillstartisnotknownyet・Howhebecameagreatscientistisknowntousall.2.主语从句后置！为了避免主语冗长，句子头重脚轻,经常用it作形式主语，主语从句放在后面作真正的主语.如：1）.Thatweshallbelateiscertain・--It"scertainthatweshallbelate・2）.Thattheearthisroundisknowntoall.一一It"sknowntoal1thattheearthisround.用it作形式主语的that从句有以下几种不同的搭配：1.It+be+形容词+that从句2.It+be+-cd分词+that从句3.主语从句需注意的问题1）・“if”通常不能引导主语从句，要用“whether”引导。2）•主语从句中用陈述句语序3）•主语从句的"that”一般不能省。Thatpricew订1goupiscertain.4）•主语从句后谓语动词用第三人称单数 Thattheyhaven"tphonedisstrange.5)・主语从句在句首时，必须市连接词引导，不能省略这些连接词；但是如果用it做形式主语，而把主语从句放在句末吋，从属连词that可以省略。6)•如果主语从句放在句首，不能用if引导，但是如果用it做形式主语，而把主语从句放在句末时，也可以用if引导.误：IfMaryreallyheardhimisreallydoubtful.正：Itwasdoubtfu1ifMaryreallyheardhim・7)・用于Itisimportant/natural/necessary/impossiblethat..•句型中，主语从句谓语动词用“(should)+动词原形”的形式，should可以省略。例：Itisimporantwe(should)believehim.8)・在it+be+suggested/advised/required/ordered/requested/insistedthat••-句型中从句谓语动词也用“(should)+动词原形”的形式.例：Itissuggestedthatwe(should)gotherebybus・9).what与that,在引导主语从句时的区别what引导主语从句时在句时在从句中充当句子成分，如主语.宾语.表语，而that则不然。例如：A：Whatyousaidyesterdayisright.What在此引导主语从句，又做said的宾语B：Thatsheisstillaliveisaconsolation。That只起连接作用，不做成分(三)表语从句1・定义：放在be动词和系动词后的从句。Thequestioniswhowi11doit. 2•可接表语从句的连系动词有be(is,am,are,was,were),look,seem,sound,appear,rcmain,become,get等。Chinaisnolongerwhatsheusedtobe.Thequestionremainswhethertheywillbeabletohelpus.Atthattime,itseemedasifIcouldn，tthinkoftherightword・2.表语从句的引导词1)・从属连词whether,as,asif/though引导的表语从句・if不能引导表语从句。Helookedjustashehadlookedtenyearsbefore・Itsoundsasifsomeoneisknockingatthedoor・2).because,why引导的表语从句That?sbecausehedicin"tunderstandme.That"swhyhegotangrywithme.ThereasonwhyIwassadwasthathedidn"tunderstandme.(…的原因是…)3).连接代词who,whom,whose,what,which,whoever,whatever,whichever连接畐词where,when,how,whyTheproblemiswhomwecangettoreplaceher.Thequestionishowhedidit.Thatwaswhatshedidthismorningonreachingtheclassroom・Thisiswhereourproblemlies・4).从属连词thatothat在表语从句中不充当句子成分，没有任何意义，也不能省略。ThetroubleisthatIhavelosthisaddress・4、使用虚拟语气的表语从句在表示“意愿，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”should可省略。常见的这些名词有：advice,suggestion,order,proposal,plan,idea等。Mysuggestionisthatwe(should)startearlytomorrow・5、表语从句的应注意的问题：1)・That在表语从句中既不充当成分，也没有任何意义Thefactisthathehasn?tyetrecoverfromi1lness・2).What在表语从句中充当主语、宾语/表语表示什么，什么样了，/所的(人或事).A.Thequestioniswhatcausedtheaccident・B.Thatmountainisnolongerwhatitusedtobe3)・Which在引导表语从句时,常充当定语，表语表示其中哪一个Ireadaboutitinsomebookoranother,butwhatIdon"tknowiswhich(book)itis.4).whether在表语从句中表“是否”，不充当句子的成分。if不能引导表语从句。Whatthedoctorreallydoubtsiswhethermymotherwi11recoverfromtheseriousdiseasesoon.5)・当主句的主语为reason,或者是由why引导的从句时，与它们相关的表语从句用that来引导，而不能由because引导；because引导表语从句时只能用于It/That/Thisis/wasbecause…那是因为…It/That/Thisis/waswhy…那就是为什么…Thereason(why*)is/wasthat・・・••白勺原因是・・・(三)同位语从句1.定义：同位语从句就是在复合句中作名词的同位语的名词性从句。 同位语从句对名词进一步解释，说明名词的具体内容,这些名词一般是抽象名词，常用名词有fact,news,hope,truth,idea,suggestion,thought,question,order,problem,belief,doubt,fear,result,information,opinion,demand,wish,promise,possibility,message,等・常用引导词:that(常用不可省略),who,when,where,why,how,whether等。2.同位语从句的引导词1).由that引导，在从句中不充当任何成分，只起引导作用，不可省略，也不能用which代替。如:Thefactthatyouhavepassedtheexamistrue・比较宾语从句：Idon"tknow(that)youhavepassedtheexam・2)•由whether引导,“是否”，注意：同位语从句中表示“是否”的意思时，不能用if。女口：Theproblemwhetherweshouldvisitherhasbeensettled・(不能用if)3).由who,when,where,how等引导女口：①Ihavenoideawhowillgowithme.②Wehaven"tsolvedtheproblemhowweshouldgothere・(3)Wehaven"tsolvedtheproblemwherewearegoingtospendtheweekend.(4)wehavenoideawhenwewillbeginourholiday.※同位语从句与定语从句的相似之处1、两种从句都可以译成定语 2、两种从句都可以用that引导Thenewsthatourteamhaswonthefinalmatchisencouraging・（同位语从句）我们队取得决赛胜利的消息令人鼓舞。Thenewsthatyoutoldusisreallyencouraging・（定语从句）你告诉我们的消息真的令人鼓舞。※同位语从句与定语从句的不同之处1、从句的作用不同：同位语从句用来进一步说明前面名词的内容；定语从句用来修饰、限定前面的名词。Thenewsthatourteamhaswonthefinalmatchisencouraging・（从句说明“消息”的内容：我们队取得了决赛胜利。）Thenewsthatyoutoldusisreallyencouraging・（从句对“消息”加以限定：是你告诉我们的，而非来自其他渠道。但消息是什么却不得而知。）1.引导从句的关联词that的功能不同：①在that引导同位语从句中，从句是个完整的句子，that只是一个连接词，不充当任何成分；that不能省略，不能用which代替。DadmadeapromisethathewouldbuymeCDplayer・(that不充当任何成分）②在that引的定语从句中，从句不完整,指代先行词又在从句中充当主语或宾语,Dadmadeapromisethatexcitedall又在从句中充当主语・）③定语从句不可用what,how,whether,缺少主语或宾语that是关系代词，既充当宾语时可以省略，可换成which.hischildren.（that扌旨代promise,来引导，而同位语从句的关连词除了that夕卜，还可根据词义使用其它疑问代词或疑问副词，如who,when,where, how,whether等。判断下列句子是同位语从句还是定语从句1.Hisproposalthatwegothereonfootisacceptable.同2.Manyteachersholdtheviewthatteenagersshouldnotspendtoomuchtimeonline・同3.Thefirstrequestthathemadewastoaskforfreedom・定4.Ihavenoideawhathedidyesterday.同2.Doyouhaveanyideawherewewi11besent?同3.Isthisthecompanywhereyourfatherworks?定4.Thisisthereasonthathegaveforhisabsence・定5.Hemadeanexcusethathiscarbrokedownontheway・同*注意：同位语从句有时可以不紧跟在它所说明的名词后面，而是被别的词隔开。HegotthenewsfromMarythatthesportsmeetingwasputoff.名词性从句专项练习第一部分：基础题1.makeshisshopdifferentisthatitoffersihotcpcTsonalservices・A.WhatB.WhoC.WhateverD.Whoever2.一It"sthirtyyearssincewelastmet・一ButIstillrememberthestory,believeitornot,wegotlostonarainynight・A.whichB.thatC・whatD.when3.Seetheflagsontopofthebuilding?Thatwaswedidthismorning.A.whenB.whichC.whereD.What4.—Couldyoudomeafavor?一Itdependsonitis.A.whichB.whichever©・whatD.whatever 1.Theseshoeslookverygood・Iwonder・A.0howmuchcosttheyarehowmuchtheycostB.howmuchdotheycostD.howmucharetheycost 6.Doris，successliesinthefactsheisco-operativeandeagertolearnfromothers.A.whichB.thatC.whenD.why7.Marywroteanarticleontheteamhadfailedtowinthegame-囚.whyB.whatC.whoD.that2.Doyouhaveanyideaisactuallygoingonintheclassroom?A.thatB.whatC.asD.which3.一Whydocsshealwaysaskyouforhelp?一Thereisnooneelse,isthere?A.whototurntocanturntoC.forwhomtoturnD.forhertoturn2.Elephantshavetheirownwaytotelltheshapeofanobjectanditisroughorsmooth.A./B・whetherC.howD.what3.Dannyleftwordwithmysecretaryhewouldcallagainintheafternoon.A.who冋.thatC.asD.which4.Mumiscoming.Whatpresentforyourbirthday?A.youexpectshehasgot|E~|doyouexpectshehasgotgotBeyouexpecthasshegotD.doyouexpecthasshewasdifferentwhat|cT|]romwhat13.Theway[hediditA.inwhichB.inwewereusedto.D.fromwhich14.Greatchangeshavetakenplaceinthatschool.Itisnolongeritwas20yearsago,itwassopoorlyequipped.A.what:whenB.that:whichC.what:whichD.which:that第二部分：强化题1.Wehaven,tsettledthequestionofitisnecessaryforhimtostudyabroad.2.A.ifB.whereC.whetherD.thatAwarmthoughtsuddenlycametomeImightusethepocketmoneytobuysomeflowersformymother?sbirthday.A.ifB.whenC.thatD.which1.ThereismuchchanceBi11wi11recoverfromhisinjuryintime fortherace. A.thatB.whichC.untilD.if4.Pleaseremindmehesaidhewasgoing・Imaybeintimetoseehimoff.A.whereBewhenC.howD.what1.Wesawseveralnativesadvancingtowardsourparty,andoneofthemcameuptous.wegavesomebellsandglasses.A.towhichB.towhomC・withwhomD.withwhich2.Withhisworkcompleted,thebusinessmansteppedbacktohisseat,feelingpleasedhewasamanofaction.A.whichB.thatC・whatD.whether3.teamwinsonSaturdaywillgothroughtothenationalchampionships・A.NomatterwhatB.Nomatterwhich让步状语从句C.WhateverD.Whichever4.Ijustwonderthatmakeshimsoexcited.强调句型A.whyitdoesB・whathedoesC.howitisD・whatitis5.isourbeliefthatimprovementsinhealthcarewillleadtoastronger,moreprosperouseconomy.强调句与主语从句的区别A.AsB.ThatC.ThisD.It6.Nobodybelievedhisreasonforbeingabsentformtheclasshehadtomeethisuncleattheairport・A.whyB.thatC・whereD.because7.Theshopkeeperdidnotwanttosellforhethoughtwasnotenough・ A.whereB.howC.whatD.which 1.Henoticcdthatthestraightpartofthedancewasdifferentintheafternoonfromithadbeeninthemorning.A.thatB.whereC・whatD.which2.I"dliketoworkwithishonestandeasytogetonwith.A.whoB.whoeverC.whomever14.Whenyouarereading,makinganoteofimportance.A.whichB.thatC.whatD.nomatterwhoyouthinkisofgreatD.when15.—Canwegeteverythingreadybytheweekend?ItalldependsonwecangetMr.Green?scooperation.A.thatB.whatC・whetherD.if1.Cwhether引导的从句构成与名词thequestion的同位语。（原答案似乎有误）2C主句完整，同时从句也不缺成分。根据句意可看出th毗引导的从句构成与awarmthought的同位语。3Athat引导同位语从句，具体说明chance（可能性）的内容。4B句意：请提醒我他说他将什么时候走。5B因先行词是natives,故淘汰A和D。又因givesth.tosb•固定短语，所以选Bo介词to可放在关系代词whom的前面。6Bpleased后面缺少宾语从句，hewasamanofaction句意完整，故用that引导。7DNomatterwhat/which只能引导让步状语从句，排除A和B。C和D的区别在于一个无范围，一个有范围。8Dwonder后面的宾语从句本是whatmakeshimsoexcited：o但what需要被强调，故用强调句型。9D本题考查it作形式主语，后而的that引导真正的主句从句.10B本题考查同位语从句，reason后面有for引导的短语，接着后面是that引导的句子来说明理由的内容.11C本题考查名词性从句的宾语从句，介词for后接宾语从句但宾语从句中缺少主语，hethought是插入语.连词what引导宾语从句且在从句中充当主语,which的意思不符合.12C本题考查固定短语bedifferentfrom同时也考查名词性从句中的宾语从句，介词from后是宾语从句，但从句中ithadbeen后面少表语，所以what符合语意。13B本题考查名词性从句中的介词宾语从句，根据下文意思以及在宾语从句中作主语，D不能引导名词性从句，who表达的意思不对.14C木题考查名词性从句介词宾语，宾语从句中youthink是插入语，故句中缺少主语,which意思不对，故选what 15C本题考查介词宾语从句，根据上下文意思该处应该是”我们是否能得到Green先生的.雄接高芳1.（10福建35）Weshouldrespectfoodandthinkaboutthepeoplewhodon"thavewehavehereandtreatfoodnicely.A.thatB.whichC.whatD.whether2.（10湖南35）Cindyshutthedoorheavilyandburstintotears・Nooneintheofficeknewshewassoangry.A.whereB.whetherC.thatD.why3.（10天津14）Asanewgraduate,hedoesn?tknowittakestostartabusinesshere■A.howB.whatC.WhenD.which1.（M匕京）somepeopleregardasadrawbackisseenasaplusbymanyothers・A.WhetherB.WhatC.ThatD.How2.（10浙江1）|—Howaboutcampingthisweekend,justforachange?一OK,youwant.A.whicheverB・howeverC・whateverD・whoever7.（10上海36）Onereasonforherprefereneeforcitylifeisshecanhaveeasyaccesstoplaceslikeshopsandrestaurants・A.thatB.howC.whatD.why9.（10山东26）Beforethesalesstart,Imakealistofmykidswillneedforthecomingseason.A.whyB.whatC.howD.which11.（10四川14）Howmuchoneenjoyshimselftravellingdependslargelyonhegoeswith,whetherhisfriendsorrelatives・A.whatB.whoC.howD.why12.（10全国I33）Wehaven"tdiscussedyetwearegoingtoplacenewfurniture・A.thatB.whichC.whatD.where13.（10湖北31）IwanttobelikedandlovedforIaminside・|A.whoB.whereC・whatD.how14.（10全国II10）一Haveyoufinishedthebook?No,I，vereaduptothechi1drendiscoverthesecretcave・A.whichB.whatC・thatD.where15.（10江苏35）—IprefershuttingmyselfinandlisteningtomusicalldayonSundays・一That"sIdon"tagree・Youshouldhaveamoreactivelife・A.whereB.howC.whenD.what 三、定语从句（形容词性从句）定语从句也叫形容词性从句，顾名思义，它在句中可以充当形容词的作用，可以修饰限定名词以及整个句子。被定语从句修饰的词叫做先行词，引导定语从句的词叫做关系词。关系词一般紧跟在先行词之后引导定语从句。关李"司的作用J关系代词起着代词和连词的作用八""用（关系副词起着副词或介词短语和连词的作用」表解关系词先行词指人指物指人和物作主语Who/that/aswhich/that/asthat作宾语who(m)/that/which/that/athatass作定语whosewhose/ofwhich（-）、考查关系词的基本用法：关系词是用在定语从句中来代替先行词的，选择关系词的关键是看先行词在定语从句中作何成分。作主语、宾语或表语时，用I关系代词I，指人用who（宾格用whom）或that,指物用which或that;如果作状语，则选用关系副词,分别用when,where,why代替吋间、地点、原因状语;如果先行词在定语从句中作定语，则不管指人还是指物，都可用whoseo［原题再现］Iworkinabusinessalmosteveryoneiswaitingforagreatchance.A.HowB.WhichC.whereD.That答案：C（二）、考查ds和which引导非限制性定语从句，代替整个主句或主句中部分内容的用法： 二者的区别是：1.as引导的从句可放在主句之前、之后或中间，而which引导的从句则不能放在主句之前。2.当从句谓语动词是beannounced/expected/known/reported/said/imagined/shown等被动形式或usuallyhappen,beoftenthecase等表示主句的习惯性或司空见惯之意时，常用aso3.当从句的谓语动词是否定形式或谓语带的是一个复合宾语结构时，一般用which不用aso［原题再现］Helenwasmuchkindertoheryoungestsonthantotheothers,,ofcourse,madetheothersenvyhim.A.whoB.thatC.whatD.which答案:D［解析］关系代词which引导非限制性定语从句,指代前面整个句子。（三）、考查“介词+关系代词”引导定语从句的用法：当先行词在定语从句中作介词的宾语时,往往可以把介词放在关系代词之前，构成"介词+关系代词（whom/which）”结构。但一些短语动词（如lookafter等）中的介词不能与动词分开,故不能放在关系代词之前。［原题再现］Americanwomenusuallyidentifytheirbestfriendassomeonetheycantalkfrequenthy.A.whoB.asC.aboutwhichD.withwhom答案：D［解析］关系代词whom在定语从句中作介词with的宾语,talkwithsb•意为"与 某人谈话”O（四）、考查分隔式定语从句的用法定语从句一般紧跟在先行词的后面，但有些时候也会被同位语、状语、谓语、其它定语等成分分隔。此时能够理清句子结构，慧眼识别先行词就显得特别重要。［原题再现］ThefilmbroughtthehoursbacktomeIwastakengoodcareofinthatfar-awayvillage・A.unt订B.thatC.whenD.where答案：C［解析］先行词为thehours,关系副词when在定语从句中作时间状语。（五）、考查定语从句与其它句子的区别：定语从句易与状语从句、同位语从句、并列句以及强调结构混淆,在做题时要细心识别。［原题再现］①Thefamousscientistgrewuphewasbornandin1930hecametoShanghai.A.whenB.WheneverC・whereD・wherever答案:C［解析］本题中的where是从属连词，引导的是地点状语从句。若引导定语从句,其前应加上先行词attheplace。②AstorygoesElizabethIofEnglandlikednothingmorethanbeingsurroundedbycleverandqualifiednoblemenatcourt・A.WhenB.whereC.whatD.that答案：D［解析］本题中that引导的是同位语从句。that引导同位语从句时，在句子中不作任何成分，而在定语从句中则要作主语、宾语或表语。③TheParkersboughtanewhousebutwi11needalotofworkbefore theycanmovein. A.theyB.itC.oneD.which答案：B［解析］it...before是常用句型。①ItwasforthisreasonherunclemovedoutofNewYorkandsettleddowninasmallvillage・A.whichB.whyC.thatD.how答案：C［解析］强调结构与其它从句的区别是去掉“Itis/was...that..・”后句子依然成立。本题是强调句式定语从句专项练习1.AfterlivinginParisforfiftyyearshereturnedtothesmalltownhegrewupasachild・A.which.B.thatC・・whereD.when2.CarolsaidtheworkwouldbedonebyOctober,personallyIdoubtverymuch・A.itB.thatC.whenD.which3.Dorothywasalwaysspeakinghighlyofherroleintheplay,A.whoB.whichC.thisD.whatofcourse,madetheothersunhappy.4.isknowntoeverybody,themoontravelsroundtheearthonceeverymonth.A.ItB.AsC.ThatD.What5.Thefilmbroughtthehoursbacktomeofinthatfar-awayvillage.Iwastakengoodcare6.A.untilB.•thatC.whenD.whereismcntioncdabove,thenumberofthestudentsinseniorschoolisincreasing. A.WhichB.AsC.ThatD.It7.IntheofficeIneverseemtohavetimeuntilafter5:30p.m.,manypeoplehavegothome・A.whosetimeB.thatC.onwhichD・bywhich8.Alloftheflowersnowraisedherehavedevelopedfromthoseintheforest・A.oncetheygrewB.theygrewonceC.theyoncegrewD.oncegrew9.Hemadeanotherwonderfuldiscovery,ofgreatimportaneetoscience・A.whichIthinkisB.whichIthinkitisC.whichIthinkitD.Ithinkis10.HewasveryrudetotheCustomsofficer,ofcoursemadethingsevenworse・A.whoB.whomC・whatD.which11.RecentlyIboughtanancientChinesevase,wasveryreasonable・A.whichpriceB.thepriceofwhichC.itspriceD.thepriceofwhose12.He"sgothimselfintoadangeroussituationheislikelytolosecontrolovertheplane.A.whereB.whichC・whileD.why13.IcanthinkofmanycasesstudentsobviouslyknewalotofEnglishwordsandexpressionsbutcouldn,twriteagoodessay. A.whyB.whichC.asD・where7.Thegentlemanyoutoldmeyesterdayprovedtobeathief・A.whoB.aboutwhomC.whomD.withwhom8.Itwasanexcitingmomentforthesefootballfansthisyear,forthefirsttimeinyearstheirteamwontheWorldCup.A.thatB.whi1eC.whichD.when9.Theresultoftheexperimentwasverygood,wehadn?texpect.A.whenB.thatC.whichD.what10.HaveyouseenthefilmTitanic,leadingactoriswor1dfamous?A.itsB.it"sC.whoseD.which11.Johnsaidhe"dbeenworkingintheofficeforanhour,wastrue・A.heB.thisC・whichD・who12.Isthisthereasonatthemeetingforhiscarelessnessinhiswork?A.heexplainedB.whatheexplainedC.howheexplainedD.whyheexplained13.Thefamousbasketbailer,triedtomakeacomeback,attractedalotofattentiori.A.whereB.whenC.whichD.who1.Co先行词是地点名词，且定语从句中缺地点状语，用关系副词whereo2.Do关系代词which代替Carol所说的话。句意为：Carol说这工作将在十月完成，我本人对此表示怀疑。3.Bo关系代词which代表前面整个主句，在定语从句中作主语。ofcourse 为插入语，做题时可略去不看。1.Bo关系代词as代表整个主句，在定语从句中作主语。2.Co先行词是表示吋间的词thehours,并在定语从句中作状语，因此选关系副词wherio定语从句与先行词被backtome分开。 1.Boas在定语从句中代表主句。意为“正如…”，它引导的定语从句既可放在主句前，也可放在主句后。which也可以代表主句，意为“这/那件事…”，但它引导的定语从句只能放在主句的后面。2.Doon不表钟点；by指吋间“到那吋为止”。句意为“在办公室里，我似乎直到下午5:30才有空，那时，许多人都已回到家。”3.Co先行词是those(指thoseflowers)otheyoncegrew前省略了关系代词whicho副词once要放在行为动词前。句意为：这儿所养的花是由他们曾在森林里种植的花培养岀来的。4.Ao答案中的“Ithink”是插入语，如果将其去掉，便可清楚地看出答案。另外，which在题中引导一个非限制性定语从句，并在从句中作主语。5.Do考点与是在第20小题相同，题干的句子结构也几乎一样。6.Bo表示先行词所表示的“那个人或物的…”用whose…或the・・・ofwhich=ofwhich…。因此，表示“花瓶的价格”可说thepriceofwhich或ofwhichtheprice或whoseprice。另外，若在itsprice前加and也对。7.Ao先行词是situation,指地点位置,用where(=inwhich)引导定语从句。8.Do先行词是manycases,定语从句中缺状语(inmanycases在许多情况下)，用where(=inwhich)引导定语从句。9.Botellsbabout••-把有关…的情况告诉某人。10.Do这是非限制性定语从句，先行词是moment,关系词在从句中作状语，用when。11.Cowhich代表整个主句，在定语从句中作hadn"texpected的宾语。12.Co用whose作定语。1&C。关系代词which,代表John所说之事，在定语从句中作主语。which=andthat/this/it。19.Aothereason后接定语从句。因为代表先行词thereason的关系代词that/which作explained的宾语，所以被省略了。注意与thereasonwhy?不同：Isthereanyreason whyyoucan?tcome?（why在定语从句中作状语）19.Do先行词是人Thefamousbasketbailer（著名的篮球明星），用who引导定语从句。