定语从句中which和that用法

定语从句中which和that用法在定语从句中，which和that在指代事物时，一般可以互换使用，但并非在任何情况下都是这样。一、宜用that,而不宜用which的情况.①先行词为不定代词all,much,something,everything,anything,nothing,none,theone等1.Weshoulddoallthatisusefultothepeople.2.There'snothingthatcanbesaidaboutit.3.Doyoumeantheonethatwasboughtyesterday?②先行词被only,any,few,little,no,just,very,oneof等词修饰时。1.Theonlythingthatwecoulddowastowait.2.That'stheverywordthatiswronglyused.3.Thelastplace(that)wevisitedwasthechemicalworks.4.Youcantakeany(=whichever)seatthatisfree.5.IhopethelittlethatIcanwillbeofsomehelptothem.③先行词是序数词时或被序数词修饰时。1.WhenwetalkaboutWuxi,thefirstthatcomesintomindisTaiLake.2.Thisisthethirdfilmthathasbeenshowninourschoolthisterm.④先行词是最高级或被最高级修饰时。1.Thisisthebestthatcanbedonenow.2.Themostimportantthingthatshouldbedonerightnowishowtostophimfromgoingon.⑤先行词既有人又有物，用which和who都不适合，这时宜用that.如：1.Thewriterandhisnovelthatyouhavejusttalkedaboutisreallywellknown.2.Theriderandhisbikethathadrunoveranoldwomanwereheldupbythepolice.⑥被修饰词为数词时.1.YesterdayIcaughttwofishandputtheminabasinofwater.Nowyoucanseethetwothatarestillalive.⑦如果有两个从句，其中一个关系代词已用which,另一个关系代词宜用that，以避免语言的单调或重复。Edisonbuiltupafactorywhichproducedthingsthathadneverbeenseenbefore.⑧疑问词是who或which，关系代词宜用that，以避免重复。1.Whichisthebookthatyoulikebest?2.Whoisthemanthatisstandingatthegate?⑨主句是Therebe结构，修饰其主句的定语从句宜用that作关系代词.如：1.Thereisstillaseatinthecornerthatisstillfree.⑩被修饰成分为表语时，或者关系代词本身是定语从句的表语时,该关系代词宜用that.1.That'sagoodbookthatwillhelpyoualot.2.Myhomevillageisnolongertheplace(that)itusedtobe.二、定语从句中宜用which而不宜用that的情况:①当关系代词的前面有介词时.1.Azooisaparkinwhichmanykindsofanimalsarekeptforexhibition.2.IsthistheroominwhichMr.Whitelives?②在非限制性定语从句中.1.Crusoe'sdog,whichwasarenowveryold,becameillanddied.2.MoreandmorepeoplearebeginningtolearnEnglish,whichisbecomingverypopularinourcountry.(which指代主句)③在一个句子中有两个定语从句，其中一个定语从句的关系代词用了that,另一个宜用which.1.Letmeshowyouthenovel，thatIborrowedfromthelibrarywhichwasnewlyopentous.2.AtthestationIboughtsomemagazinesthatmighthelpmetopassthetimeonthetrainandwhichIcouldpassontootherswhenIfinishedthem.④当关系代词后面带有插入语时.1.Here'stheEnglishgrammarwhich,asIhavetoldyou,willhelpimproveyourEnglish.⑤先行词本身是that,宜用which.What'sthatwhichsheislookingat?⑥先行词是those+复数名词.Ashopshouldkeepastockofthosegoodswhichsellbest.