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Unit5Grammar定语从句(非限制性定语从句)一．概述非限制性定语从句的前面往往有逗号隔开，如若将非限定性定语从句放在句子中间，起前后都需要用逗号隔开。1)TheotherdayImetLiLei,whoseemedtobeverybusy.不久前的一天我碰上李雷了,他好象很忙。2)Hismother,wholoveshimverymuch,isstrictwithhim.他妈妈很爱他，对他要求很严格。非限制性定语从句和单句的比较1)Hefailedintheexam._It_madehisparentsangry.2)Hefailedintheexam;Itmadehisparentsangry.3)Hefailedintheexam,_whichmadehisparentsangry.二．非限制性定语从句应注意以下几点：（一）非限制性定语从句中的关系词：1.关系代词如下表所示：指代对象代指人代指物主格whowhich,as宾格whom所有格ofwhom,whoseofwhich,whose1)Thehouse,______weboughtlastmonth,isverynice.这幢房子很漂亮，是我们上个月买的。2)MissHowe,_______youmetinthelibrary,isournewteacher.3)YesterdayIboughtaT-shirt,________onlycostme18Yuan.4)Tom’sfather,________isoversixty,stillworksharddayandnight.汤姆的父亲已经六十多岁了，但他仍然从早到晚忙碌地工作。5)LiMing,________motherhasbeenillfortwodays,isabsentfromschooltoday.6)Yesterdayshesoldhercar,_______sheboughtamonthago.7)John’swife,____woksinBeijing,camebackhomeyesterday.注意：非限制性定语从句中关系代词which/whom在从句中作宾语时，不可省略。1)Thisbook,whichyoucangetatanybookshop,willgiveyoualltheinformationyouneed.这本书会给你提供所有你需要的资料，它在任何一家书店都能买到。2)ThismorningImetTom,whomIhadn'tseenforages.今天早上我碰见汤姆，我很多年未见到他了。2.关系副词有when和where；关系副词why不能引导非限制性定语从句，要用forwhich代替。1)YesterdayJimmyleftforCanada,_______hehadstayedtwoyears.昨天，吉米动身到加拿大去了，他曾在那儿呆了两年。2)ThePeople’sRepublicofChinawasfoundedin1949,_________hewasborn.3)Ihadtoldthemthereason,__________Ididn’tattendthemeeting.(二)关系代词前介词的选择。1.依据定语从句中动词的习惯搭配来确定1)Iboughtagreatmanybooks,______whichIspentallmymoneythatIsaved.我买了很多书，这些书花了我所有的积蓄。2)Thisproject,_______whichIhavedevotedlotsoftime,willbeagreatsuccess.这项工程我投入了很多时间，肯定能成功。2.依据先行词的某种习惯搭配来确定1)I’llneverforgetthetime,duringwhichIspentmychildhoodinthecountry.我永远不会忘记我在乡村度过的童年时光。2)Herbag,inwhichsheputallherbooks,hasnotbeenfound.用适当的介词填空：1)Inthedarkstreet,therewasn’tasingleperson___whomshecouldturnforhelp.2)Atlastwefoundtheholeinthewall_________whichthemousegotintothehouselastnight.（三）含有“不定代词both/some/any/all/none等或基数词+ofwhich/whom“结构的非限制性定语从句1)Hehasthreesons,allofwhomarecollegestudents.2)Thereare51studentsinClassThree，noneofwhomfailedinthemonthlyexaminationlastweek.3)Herearethequestions,someofwhichIthoughtaredifficultforyou.4)PresentatthemeetingwerealmostexpertsonDNA,mostofwhomcamefromtheUS.出席会议的大都是DNA专家，其中大部分来自美国。5)Ihavethreeforeignteachers,twoofwhomarefromCanada.填空：Weshouldn’tspendourmoneytestingsomanypeople,mostof______arehealthy.小贴士此类题解题的关键是看句中的标号。如果是逗号，通常考虑关系词，反之，考虑人称代词。1)Hehastwosons.Bothof________areteachers.2)Hehastwosons,bothof________areteachers.(四)关系代词as的用法1.as与which都可以代指主句整个句子的内容，有时可以互换Heisadoctor,as/whichweknowfromhismanner.2.区别点：A.as引导的定语从句可以放在句首，而which则不能。B.as意为“正如……”，后面的谓语动词多是see，know，expect，say，mention，report，announce等；which意为“这一点”。1)Hedidn’tknowFrench,whichmadeitdifficultforhimtostudyatauniversityinFrance.2)Smokingisharmfultoone'shealth，asweknow,3)Asweknow，morethanseventypercentoftheearthiscoveredwithwater.正如我们所知，地球表面的70%以上被水覆盖。4)Hecamebackhomelate，asweexpected.正如我们所料，他回家晚了。注意：as的固定结构：Sheislate，asisoftenthecase．她迟到了，这是经常的事Taiwan，asyouknow，isaninseparablepartofChina．你知道，台湾是中国不可分割的一部分。Asisannouncedinthepapers，ourcountryhaslaunchedanotherman-madeearthsatellite．报纸宣布，我国又发射了一颗人造地球卫星。I’veneverheardsuchawonderfulsongashe’ssinging.即学即练：1)Thenumberofthestudentsinseniorhighschoolsisincreasing，________ismentionedabove，2)________isoftenthecasewithelderpeople，mygrandmatalkedaboutmynewhairstyleforatleast50minutesnonstop.比较：Itissoheavyaboxasnomancanlift.这是一个没有人搬得动的大盒子。Itissoheavyaboxthatnomancanliftit.Thisissuchanovelasallpeople,bothyoungandold,liketoread。Thisissuchanovelasallpeople,bothyoungandold,liketoreadit.高考链接：1.Iwalkedinourgarden,_______TomandJimweretyingabigsignontooneofthetrees.2.TheBeatles,_______manyofyouareoldenoughtoremember,camefromLiverpool.3.ShewaseducatedatBeijingUniversity,____shewentontohaveheradvancedstudyabroad.4.Lastweek,onlytwopeoplecametolookatthehouse，_______wantedtobuyit.(5.Itisreportedthattwoschools,_____arebeingbuiltinmyhometown,willopennextyear.6.Thegrowingspeedofaplantisinfluencedbyanumberoffactors,_____arebeyondourcontrol.7.TheywillflytoWashington,_____theyplantostayfortwoorthreedays.8.Manychildren,______parentsareawayworkinginbigcities,aretakengoodcareofinthevillage．9.WheneverImether,_______wasfairlyoften,shegreetedmewithasweetsmile.10.Asachild,Jackstudiedinavillageschool,_______isnamedafterhisgrandfather.11.Thesettlementishometonearly1,000people,manyof_____lefttheirvillagehomesforabetterlifeinthecity.12.Ourteacherurgesustoformagoodhabitoflearning，________wethinkwillbenefitusinthe13.Rememberthatthereisstillonepoint________wemustmakeclearattheconferencetomorrow.14.Alltheneighborsadmirethisfamily，________thechildrenandparentsbuildupafriendlyrelationship.15.Astotheunemployment，thegovernmenthastakenaseriesofmeasuresinmanyareas，________，Iamsure，willbenefitthepeopleoutofwork.16Thereason_______hewaslateagainwasthathewascaughtinatrafficjamintherushhour.117.Ihatetheway_______youtalktoyourmother.18.Youthinkthereason_______hegaveisbelievable.19.____isreportedinthenewspaper,talksbetweenthetwocountriesaremakingprogress.20.Isthismuseum_____the