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1、“定语从句”知识点的归纳定语从句在整个句子中起着定语的作用，用来修饰名词或代词，被修饰的名词或代词叫做先行词。定语从句通常放在它所修饰的名词和代词之后。定语从句通常由关系代词和关系副词引导.一.关系代词有who,whom,whose,that,which等:(注意：whom,that,which在从句中作宾语时可以省略。)1.who引导的定语从句，修饰人，代替先行词在从句中作主语:Themanwhocameherejustnowisapainter.Heisthestudentwhowonthefirstprize.Acl
2、eanerisapersonwhocleansstreetseveryday.Youcan’twakeupapersonwhopretendstobeasleep.2.whom引导的定语从句，修饰人，代替先行词在从句中作宾语:Theman(whom)myfatheristalkingtoismyEnglishteacher.Jimistheboy(whom)Iborrowedthebookfrom.Heistheperson(whom)thepolicearelookingfor.注:who在非正式英语中也可作宾语,但可省
3、略,例如:Theman(who)yousawisMr.Green.=Theman(whom)yousawisMr.Green.但是,如果引导词前面有介词时,只能用whom,不能用who:正:Themantowhommyfatheristalkingismyteacher.误:Themantowhomyfatheristalkingismyteacher.3.whose引导的定语从句,可以修饰人也可以修饰物,代替形容词性的物主代词在从句中作定语，因此，whose的后面通常要跟名词:Achildwhoseparentsareb
4、othdeadiscalledanorphan.Weallhatetheboywhosefatherisveryrichandhasacar.Pleasepassmethebookwhosecoverisgreen. Thedeskwhoselegisbrokenisveryold.4.that引导的定语从句,可以修饰人也可以修饰物，代替先行词在从句中主语或宾语:Childrenmaydosomethingthatmakestheirparentsangry.Theletter(that)Igotfromhimwaswri
5、tteninEnglish.Doyouknowthewomanthatsellseggs?Ishetheman(that)youarewaitingfor?注:that修饰人时,分别可以who和whom替换使用.5.which引导的定语从句,修饰物，代替先行词在从句中主语或宾语:TheTeaHousewhichwaswrittenbyCaoYUismyfavorite.AnotheracronymisF2Fwhichmeansfacetoface.Thestory(which)hetoldmadeuslaugh.Beiji
6、ngistheplacewhichIwasbornin. (=BeijingistheplacewhereIwasborn.) 注:which有时可以和替换that使用.8二.关系副词有when,where,why等:1.When引导的定语从句，修饰时间，代替“介词+先行词”在从句中作时间状语。IwillneverfgorgetthedaywhenIjoinedtheparty.Shearrivedat12o’clockwhenitwasraininghard.2.where引导的定语从句，修饰地点，代替“介词+先行词”在
7、从句中作地点状语.ThisisthehousewhereIwasborn.HewasborninShanghaiwherehestayedfor12years.3.why引导的定语从句，一般只修饰thereason，在从句中表示原因。Thisisthereasonwhyherefusedtocometotheparty.三.定语从句要注意的几个问题:1."介词+which"结构:关系副词when,where,why的含义相当于"介词+which"结构，因此常常和"介词+which"结构替换使用，例如：Iwillneverf
8、gorgetthedaywhenIjoinedtheparty?→IwillneverfgorgetthedayonwhichIjoinedtheparty?Shearrivedat12o’clockwhenitwasraininghard.→Shearrivedat12o’clockatwhichit
