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1、AttributiveClause定语从句一、定义定语从句：修饰名词或代词的从句。换句话说，名词、代词后的从句叫定语从句。先行词：被定语从句修饰的名词、代词、甚至词组或句子叫先行词。关系词：引导定语从句的词叫关系词。1关系代词：在定语从句中担任主、宾、表、定语成分2关系副词：在定语从句中担任状语成分关系词3个功能：1.连接功能（连接先行词与定语从句）；2.担任功能（在定语从句中担任主、宾、表、定、状语）；3.替代功能（在定语从句中代替先行词）。关系代词在定语从句中充当主语的是：who,that,which,as宾语的是：who,whom,that,which,as定语的是：whose,whic
2、h先行词是人时，关系代词是：who,whom,that,as先行词是物时，关系代词是：which,that,whose,as关系副词有：when(先行词为时间),where(先行词为地点),why(先行词为原因)关系副词=介词+which/whom定语从句分为两种：限制性与非限制性。先行词与关系词之间无逗号隔开为限制性；有逗号隔开则为非限制性，且一般由which引导。唯一可以置于先行词之前的定语从句由关系代词as引导。二、关系代词引导的定语从句1.who指人，在从句中做主语(1)TheboyswhoareplayingfootballarefromClassOne.(2)YesterdayIh
3、elpedanoldmanwholosthisway.2.whom指人，在定语从句中充当宾语，常可省略。(1)Mr.Liuistheperson(whom)youtalkedaboutonthebus.(2)Mr.LingisjusttheboywhomIwanttosee.注意：关系代词whom在口语和非正式语体中常用who代替，可省略。(3)Themanwho/whomyoumetjustnowismyfriend.3.which指物，在定语从句中做主语或者宾语，做宾语时可省略(1)Footballisagamewhichislikedbymostboys.(2)Thisisthepen(
4、which)heboughtyesterday.4.that指人时，相当于who或者whom；指物时，相当于which。在宾语从句中做主语或者宾语，做宾语时可省略。(5)Thenumberofthepeoplethat/whocometovisitthecityeachyearrisesonemillion.(6)Whereisthemanthat/whomIsawthismorning?5.whose通常指人，也可指物，在定语从句中做定语，有从属关系。(1)Hehasafriendwhosefatherisadoctor.(2)Ioncelivedinahousewhoseroofhasfa
5、llenin.whose指物时，常用以下结构来代替(3)Theclassroomwhosedoorisbrokenwillsoonberepaired.(4)Theclassroomthedoorofwhichisbrokenwillsoonberepaired.(5)Doyoulikethebookwhosecoverisyellow?(6)Doyoulikethebookthecolorofwhichisyellow?三、介词+关系代词引导的定语从句关系代词在定语从句中做介词宾语时，从句常由介词+关系代词引导(1)Theschool(that/which)heoncestudiedinis
6、veryfamous.(2)Theschoolinwhichheoncestudiedisveryfamous.(3)TomorrowIwillbringhereamagazine(that/which)youaskedfor.(4)TomorrowIwillbringhereamagazineforwhichyouasked.(5)We’llgotohearthefamoussinger(whom/that/who)wehaveoftentalkedabout.(6)We’llgotohearthefamoussingeraboutwhomwehaveoftentalked.注意：1.含有介
7、词的动词短语一般不拆开使用，如：lookfor,lookafter,takecareof等(1)Thisisthewatchwhich/thatIamlookingfor.(T)(2)ThisisthewatchforwhichIamlooking.(F)2.若介词放在关系代词前，关系代词指人时用whom，不可用who或者that；指物时用which，不能用that；关系代词是所有格时用whose
