关系副词指代功能指代内容所做成分是否可省略when(=at/in/on/duringwhich)修饰时间thatwhere(=in/at/onwhich)修饰地点whichwhy(=forwhich)修饰原因whowhomwhosewhose在定语从句中作定语，与后面的名词为所属关系。whose多指人，也可指物，指物时可与ofwhich互换使用。Doyoulikethebookwhosecoverisyellow?=Doyoulikethebookthecoverofwhichisyellow?只能用that的情况：(1)限制性定语从句中先行词为all,everything,anything,nothing,none,few,little,some等不定代词指物时。(2)Therebe句型中用that。ThereisabookonthedeskthatbelongstoTom.(3)先行词被序数词或最高级修饰。Thisisthefirstbook(that)hehasread.(4)先行词是who或which引导的主句。Whoisthegirlthatdrovethecar?WhichistheT-shirtthatfitsmemost?(5)当先行词既有人又有物。Theytalkedaboutthepersonsandthingsthattheyrememberedatschool(6)先行词被all,every,no,some,any,little,much,theonly,thevery,thelast,just,right等修饰。I’vereadallthebooksthatarenotmine(7）先行词在主句中作表语时，关系词只用that.ThisisthebookthatIlovebest.注意：并非先行词表示时间或地点时都分别用when或where来引导相应的定语从句，若关系词在修饰表示时间或地点的先行词的定语从句中充当主语、宾语等而不是状语时，需用which或that引导相应的定语从句。Doyoustillrememberthedayswhich/thatwespenttogetherinschool?Westillrememberedthedayswhenwetravelledtogether一、as引导限制性定语从句主要结构有：thesame…as，as…as，such…as，so…as主句中出现thesame,as,such,so修饰先行词，需选择as做关系代词在定语从句中做主语或宾语。1.It’sthesamepersonaswewantedtofindyesterday.2.Doyouhavesuchbooksaswelike?3.Shewillmarryashealthyamanasshecanfind.二、引导非限制性定语从句⑴as引导非限制性定语从句，指代整个主句内容，从句可置于句首，句中或句尾，常有“正如”的意思1．Aseveryoneknows,Chinaisabeautifulcountrywithalonghistory.2Theearth,asweknow,movesroundthesun.⑵非限制性定语从句中的谓语为被动式时，常用as做主语besaid/known/announced/reported/mentioned/expected/discussedAsisknowntoall,TaiWanispartofChina.定语从句习题1.Theplace_______interestedmemostwastheChildren'sPalace.A.WhichB.whereC.whatD.inwhich2.Doyouknowtheman_______?A.whomIspokeB.towhospokeC.IspoketoD.thatIspoke3.Thisisthehotel_______lastmonth.A.whichtheystayedB.atthattheystayedC.wheretheystayedatD.wheretheystayed4.Doyouknowtheyear______theChineseCommunistPartywasfounded?A.whichB.thatC.whenD.onwhich5.Thatistheday______I'llneverforget.A.whichB.onwhichC.inwhichD.when6.Thefactory______we'llvisitnextweekisnotfarfromhere.A.whereB.towhichC.whichD.inwhich7.Greatchangeshavetakenplacesincetheninthefactory_______weareworking.A.whereB.thatC.whichD.there8.Thisisoneofthebestfilms_______.A.thathavebeenshownthisyearB.thathaveshownC.thathasbeenshownthisyearD.thatyoutalked9.Canyoulendmethebook______theotherday?A.aboutwhichyoutalkedB.whichyoutalkedC.aboutthatyoutalkedD.thatyoutalked10.Thepen______heiswritingismine.A.withwhichB.inwhichC.onwhichD.bywhich11.Theyarrivedatafarmhouse,infrontof______satasmallboy.A.whomB.whoC.whichD.that12.Theengineer______myfatherworksisabout50yearsold.A.towhomB.onwhomC.withwhichD.withwhom13.Itthereanyoneinyourclass______familyisinthecountry?A.whoB.who'sC.whichD.whose14.I'minterestedin______youhavesaid.A.allthatB.allwhatC.thatD.which15.Iwanttousethesamedictionary______wasusedyesterday.A.whichB.whoC.whatD.as16.Heisn'tsuchaman______heusedtobe.A.whoB.whomC.thatD.as17.HeisgoodatEnglish,______weallknow.A.thatB.asC.whomD.what18.LiMing,______totheconcertenjoyeditverymuch.A.IwentwithB.withwhom...
