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1、定语从句I.定义：定语是修饰名词或代词的成分，定语可由单词、短语来充当。当用一个句了来充当名词或代词的修饰语时，这种起定语作用的句子就被称为定语从句。Theyhaveacleverson.Doyouknowthemanoverthere?Iknowthemanwhowrotethebook.II.要点：1.定语从句的前面都有先行词（被修饰语）Thisistheboywhomwearelookingfor2.定语从句应紧跟在先行词之后3.先行词与定语从句之间要有关系词（有时可省略）4.关系词在定语从句中充当某一成
2、分Thegirlwhoisstandingunderthetreeismysiste匚Themanwhomyouwanttoseehascome・III.关系词基木用法主格宾格所冇格人whowhomwhose物whichwhichofwhich但that一般可用来代替who,whom,which,作宾格时可省略Doyouremembertheteacherthat/whotaughtusEnglish?Abookstoreisastorethat/whichsellsbooks.Theman(that/whom
3、/who)youknowisafamousprofessor.A)that不能用来替代who,whom,which的两种情况1)"介词+whom/which”的结构中，不能用thatSheisagoodstudentfromwhomweshouldlearn.2)在非限制性定语从句中，逗号后面不能用thatShesanganewsong,whichwelikeverymuch・注意：非限制性定语从句的关系代词不能省略B)用that不用which的一些特殊情况1)先行词为all,much,little,somet
4、hing,anything,everything,nothing等Isthereanything(that)Icandoforyou?2)先行词前有形容词最高级修饰ThisisthemostexcitingreportthatIhaveeverread・3)先行词前有first,last,next,only,very,all,any等词修饰Thefirststep(that)wcarctotakeisverydifficult.1)先行词同时含有“人”和“非人”时，用that不用which,也不用who/who
5、mHetalkedaboutthepeopleandthebooksthatinterestedhim.A)关系副词when,where,why用关系副词when时，它的先行词是表示时间的名词，用where时先行词是表示地点的名词，而用why时它的先行词只可能是reason,使用时应注意以下几点：1)关系代词的选择主要是看先行词在从句中所作的成分ThisisthecitywhereIwasborn.Thisisthecity(which/that)hehasvisitedIdon'tknowthereasonw
6、hysheislate.Thatisthereason(which/that)everybodyknowsDoyoustillrememberthedaywhenhearrived?Doyoustillremembertheday(that/which)wespenttogether?2)关系副when,where,whynJ*由"介词+which”的结构来替代Isthisthereasonforwhichtheycame?Heleftthedayonwhich1came.注意：how不能用来引导定语从句Thi
7、sisthewayhowhedidit.B)As作关系代词的用法与thesame,such连丿IJThisisthesamebookasIreadlastweek.SuchbooksasIhavereadareclassicalworks・练习:1・ThebookisyellowwasgiventomebyMr.Li.A)it'scoverC)whosecoverB)itscoverD)thecoverofthat2.Whowasthegrey-hairedoldwomanatyesterday'smeetin
8、g?A)wesawherC)wesawB)wesawwhomD)shewasseen3.Hemakesgooduseofthetimehecanspare・A)whenC)thatB)inthatD)inwhich4.Idon'tknowtheroomA)whereourheadmasterlivesinB)ourheadmasterlivesinC)inthatourheadmast
