以下情况,引导词用that,不用which.1.先行词为不定代词everything,nothing，anything,little,much,all,nonee.g.Finally,thethiefhandedeverythingthathehadstolen.2.当先行词被both,all,every,no,any,littlemuch,some修饰时e.g.AndthenIwatchedalltheglassesthatwereonthetablefelloffontothefloor.3.先行词被theonly，thevery，thelast修饰时，用that。e.g.HeistheonlypersonthatIwanttoseenow.4先行词前有形容词最高级、序数词修饰时，用that。e.g.Thisisthebestbook(that)I’veeverread.5.先行词同时指人和指物时,用that.e.g.Wetalkedaboutthethingsandpersonsthatwesawthen.6.当主句是以who或which开头的特殊疑问句（为了避免重复）e.g.Whichisthecarthathittheboy?Whowasthemanthatshedancedwith?7定语从句内容为解释名词的性质、概念时，需用that。e.g.Aplaneisamachinethatcanfly.8.当先行词在定语从句中作表语时，无论先行词是人是物，都用that.e.g.Chinaisnolongerthecountrythatshewas.（9）主句是therebe结构，修饰其主语的定语从句用thate.g.ThereisabookonthedeskthatbelongstoFrank.但若主语是人，引导词只能用“who,whome.g.Thereisapersonwhowantstoseeyou.二，定语从句中只用which不用that的情况（1）当关系代词前有介词时Thisisthehouseofwhichthewindowsfacesouth.（2）引导非限制性定语从句which可代表先行词或者前句，译成“这一点/这件事”。。Hisdog,whichwasveryold,becameill.Tomcameback,whichmadeusveryhappy.三，定语从句中用“who”而不用“that”的情况(1)先行词为one,ones,anyone,all,those指人时，引导词用whoe.g.Anyonewhodidn’tcomemustbepunished.（2）先行词是that,those指物时，引导词用whichWhat’sthatwhichwasbrightinthecar.(3)当先行词为人称代词时Hewhodoesn’tmakemistakemakesnothing.注意一：主谓一致定语从句的关系代词在从句中主语时，从句的谓语动词的形式根据句子的先行词来确定，即先行词为单数，从句谓语动词单数，先行词为复数，从句谓语动词为复数Iwhoamastudentmuststudyhard.Heisoneofthestudentswhowerelateforschool.Heistheonlyoneofthestudentswhowaslateforschool.注意二：which与whose作定语时的区别两个皆可在定语从句中做定语用，whose+名词=the+名词+ofwhich/whomWeliveintheroom,whosewindowisbroken.Weliveintheroom,thewindowofwhichisbroken.关系代词whose还可以在从句中与他修饰的词一起做介词短语ThebossdepartmentMrKingworkedlikestravelVerymuch.inwhose名词（或代词或数词）+介词+which(或whom)引出Weliveintheroom,thewindowofwhichisbroken.Wehavetwospareroomsupstairs,neitherofwhichhasbeenhasbeenmuchusedinthepasttwoyears.关于先行词是way定语从句的表答译:能告诉我你解决这个问题的方法吗?Canyoutellmetheway_____yousolvedtheproblem?Canyoutellmetheway_____yousolvedtheproblem?Canyoutellmetheway_________yousolvedtheproblem?-------thatinwhich非限定性定语从句（一）关系代词不能用that。指人时，做主语用who，指宾语用whom，指物用which注意：即使引导词做宾语也不能省MissZhang,whomyoumetatthestation,isfromAmerica.“介词+关系代词”引导的定语从句“介词+关系代词”（指代物用which，指代人用whom)不能用that，也不能省略“介词+关系代词”引导的定语从句“介词+关系代词”（指代物用which，指代人用whom)不能用that，也不能省略Which和as的选择（1）位置的摆放(2)as用于固定搭配，先行词与such,so,thesame连用时1.ThisisnotsuchabookasIexpected.2.Iliveinthesamebuildingashe(livesin).3.Hereissobigastoneasnomancanlift.4.Jimissuchamanasisalwaysreadytoshareourhappinessandsorrow.在限制性定语从句中，当先行词之前出现as,thesame,so,such等修饰词时，定语从句一般只能用as来引导。(3)在非限定性定语从句中1.Asweallknow,TaiwanhasbeenaninseparablepartofChina.2.Marywaslateforschool,asoftenhappened.☺ashasbeensaidbefore☺asmaybeimagined☺asiswellknown☺asweexpected☺ashasbeenalreadypointedout☺asweallcansee.
