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1、初三英语定语从句讲解及练习题在复合句中修饰名词和代词的从句叫做定语从句。被定语从句修饰的名词或代词叫做先行词。引导定语从句的关系代词有who,whose,whom,which,that。引导定语从句的关系副词有when,where,why。关系代词在定语从句中做主语，宾语，定语。关系副词在定语从句中做状语。一、who引导的定语从句,who在从句中做主语(口语中也可做宾语)，修饰表示人的先行词。Thisisthemanwhohelpedme.Theboywho//whomwesawyesterdayisJohn’sbrother.二、whom引
2、导的定语从句,whom在从句中作宾语,修饰表示人的先行词，口语中可以省略。Thedoctor(whom)youarelookingforisintheroom.Theperson(whom)youjusttalkedtoisMr.Li.=ThepersontowhomyoujusttalkedisMr.Li.(介词后whom不能省略)Thebabieswhomthenursesarelookingafterareveryhealthy.(固定短语中的介词一般不能拆开，仍放在动词之后。lookfor/lookafter/takecareof/p
3、uton/takeoff…)三、whose引导的定语从句,whose在从句中作定语，修饰表示人或物的先行词。DoyouknowthewomanwhosenameisMary.Passmethedictionarywhosecoverisblack.Hehasafriendwhosefatherisadoctor.四、that引导的定语从句，that在从句中做主语或宾语、修饰表示人或物的先行词。作宾语时可省略,不能放在介词后面作宾语.(that指人时，相当于who或者whom；指物时，相当于which)Theletter(that//which
4、)Ireceivedwasfrommyfather.Ican’tfindtheletterthat//whichcamethismorning.Doyoustillrememberthedays(that//which)wespenttogether?Thisisthemanthat//whohelpedme.Thehouse(that//which)weliveinisnotlarge.=Thehouseinwhichweliveisnotlarge.Thedoctor(that//whom//who)youarelookingforisi
5、ntheroom.五、which引导的定语从句，which在从句中做主语，也可做宾语，或介词的宾语，修饰表示物的先行词。7Thisisthebook(which/that)youwant.Thebuildingwhich//thatstandsneartheriverisourschool.Theroominwhichthereisamachineisaworkshop.(介词后面的which不能省略)Thehouse(which/that)weliveinisnotlarge.Thisisthewatch(which/that)hewasl
6、ookingfor.六、that和which都可以修饰表示物的先行词,但是下列情况只能用that.先行词为不定代词all,few,little,much,everything,nothing,anything等.All(that)youhavetodoistopractiseeveryday.Thereisn’tmuch(that)Icando.Telluseverythingthatyouknow,please.Isthereanythingthatyoudon’tunderstand?先行词被序数词或形容词的最高级所修饰时.Thefirs
7、tlesson(that)Ilearnedwillneverbeforgotten.Thisisthebestfilm(that)Ihaveeverseen.先行词被all,any,every,few,little,no,some,much等不定代词修饰时.Ihavereadallthebooks(that)yougaveme.先行词被theonly,thevery,thelast,thesame等修饰时.ThisistheverybookthatIwanttoread.ThisisthesamebookthatIwanttoread.Thi
8、sisthelasttime(that)Ishallgiveyoualesson.ThisistheonlythingthatIcanremember.七、由whe
