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1、1•先行词：被定语从句修饰的词叫先行词。关系词：引导定语从句的词叫关系词2.关系词冇关系代词和关系副词。关系代词冇that,which,who,whom,whose,as等；关系副词冇when,where,why等。3.关系词通常有下列三个作用：A、引导定语从句；B、代替先行词；C、在定语从句中担当一个成分。例如：Themanwhoisshakinghandswithmyfatherisapoliccman.关系代词引导的定语从句1.指人who,thatoThat指人时，相当丁who或whomw
2、hom抬人，在定语从句中做宾语，常可省略。Theboyswho/thatareplayingfootballarefromClassOne.MrLiuistheperson(whom)youtalkedaboutonthebus.注意：关系代词whom在口语或非正式文体中常可用who来彳弋替，也可省略。Theman(whom/who)youmetjustnowismyoldfriend.3.指物Which,thato,在定语从句中做主语或宾语，做宾语时常可省略。Theseasonthat/whi
3、chcomesafterspringissummer.春天以后的季节是夏季。4.Whose通常指人，也可指物，在定语从句中做定语。Ioncelivedinthehousewhoseroofhasfallenin.Doyoulikethebookthecoverofwhichisyellow?关系副词引导的定语从句1.when指时间，在定语从句屮作时间状语。IstillrememberthedaywhenIfirstcametothisschool.2.where指地点，在定语从句中作地点状语。S
4、hanghaiisthecitywhereIwasbom.3.why指原因，在定语从句中作原因状语。Pleasetellmethereasonwhyyoumissedtheplane.关系副词引导的定语从句经常可以用“介词+关系代词”引导的定语从句来表示。如：Greatchangesarctakingplaceinthecitywhere/inwhichtheylive・(三)“介词+关系代词”引导的定语从句关系代词在定语从句中作介词宾语时，从句常常由''介词+关系代词"引出。Theschool
5、(which/that)heoncestudiedinisveryfamous・Theschoolinwhichheoncestudiedisveryfamous.他曾经就读过的学校很出名。ThemanagerwhosecompanyIworkinpaysmuchattentiontoimprovingourworkingconditions・ThemanagerinwhosecompanyIworkpaysmuchattentiontoimprovingourworkingconditions
6、・注意：1.含有介词的短语动词…般不拆开，介词仍放在短诰动词的后而。lookfor,lookafter,takecareof如Thisisthewatch(which/that)Iamlookingfor.Thebabies(whom/who/that)thenurseislookingafterareveryhealthy.2.若介词放在关系代词前，关系代词指人时只可用whom；关系代词指物时只可用whicho关系代词是所冇格时用whoseoThemanwithwhomyoutalkedjus
7、tnowismyneighbour.TheplaneinwhichweflewtoCanadawasreallycomfortable・"介词+关系代词‘9前还可有some,any,none,all,both,neither,many,most,each,few等代词或者数词。Heloveshisparentsdeeply,bothofwhomareverykindtohim.Uptonow,hehaswrittentenstories,threeofwhichareaboutcountryli
8、fe.非限制性定语从句形式上：用逗号"，”与主句隔开。关系词的使用上：which;不可用who代替whom非限制性定语从句举例：Hismother,wholoveshimverymuch,isstrictwithhim.China,whichwasfoundedin1949,isbecomingmoreandmorepowerful.定语从句中只能用that引导定语从句的情况1.当先行词是everything,anything,nothing（something除外）,all,none,few,
