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1、定语从句修饰名词或代词的句子叫定语从句。定语从句一般紧跟在它所修饰的先行词之后。被修饰的词叫先行词引导从句的词叫关系词。定语从句分为限定性定语从句和非限定性定语从句关系词分为关系代词：that,which,who,whom,whose,as和关系副词：when,where,why关系词通常有三个作用：A.引导定语从句；B.代替先行词；C.在定语从句中充当一个成分。Themanwhoisshakinghandswithmyfatherisapoliceman.如何使用关系词:1.关系代词主语宾语定语指代人指代物2.关系副词_______,______,______who
2、thataswhomthataswhosewhichthataswhichthataswhosewhenwherewhy作状语Haveatry指出下列关系代词（副词）在定语从句中的成份：1.ThemanwhocametoourschoolisMr.Wang.()2.Thegirl(whom)ImetwasLucy.()主语动宾3.Ilikethepersontowhomyoujusttalked.()4.AchildwhoseparentsaredeadiscalledTom.()5.Weshallneverforgetthedayswhenwelivedtogeth
3、er.()介宾状语定语Combineeachpairofsentencesusingthat,which,who,whom,whoseTheboyisholdingadog.Hehasgoldenhair.TheboyisJim.Theboyisholdingadog.Theboywhohasgoldenhairisholdingadog.TheboywhoisholdingadogisJim.ThemanisMr.Black.Heisshoutingforhelp.ThemanwhoisshoutingforhelpisMr.Black.Themanisshouti
4、ngforhelp.Hishouseisonfire.Themanwhosehouseisonfireisshoutingforhelp.Theboyisholdingadog.Hishairisgolden.Theboywhosehairisgoldenisholdingadog.that和which在指物的情况下一般可以互换,但在下列情况下,只用that不用which：1先行词被序数词/最高级修饰时Thisisthefirstbookthathehasread.HamburgisthemostbeautifulcitythatI’veeverseen.2先行词被t
5、hevery,theonly，thelast修饰时Thisistheverypenthatsheislookingfor.3先行词中既有人又有物Hetalkedabouttheteachersandschoolsthathehadvisited.4当先行词是不定代词all,one,any,few,little,much,something或被不定代词修饰时Isthereanythingthatyoudon’tunderstand?Allthebooksthatyouneedarehere.somethinganybodynoone下列情况下不能用that,只能用whi
6、ch①引导非限制性定语从句时Football,whichisaveryinterestinggame,isplayedallovertheworld.②介词之后（介词后指物用which,指人用whom）Theperson________IamspeakingjustnowisourEnglishteacher.Theprize________heworkedsohardwasanewbicycle.towhomforwhich定语从句中主谓一致问题当关系代词在定语从句中做主语时，其后的谓语动词在人称和数方面与先行词保持一致。1Thewatcheswhich_____r
7、epairedlastweekhavenotbeensentback.2I,who______aPartymember,shouldworkhardforourcountry.weream注意Heisoneofthetopstudentswhohavegotgoldmedals.Heistheonlyoneofthetopstudentswhohasgotgoldmedals.Heistheoneofthetopstudentswhohasgotgoldmedals.关系代词as的用法 当先行词被such、as、so、thesame修饰时，关系词用a
