高中英语定语从句详解

高中英语定语从句详解定语从句三步：第一找出先行词；第二看先行词在定语从句中的语法功能（做主语、宾语或状语）；第三选择合适的关系词。(1)定语从句：在主从复合句中用作定语的从句叫定语从句。定语从句一般紧接在先行词(antecedent)后面。(2)先行词：被定语从句修饰的成份。先行词可以为一个词，短语，或整个主句。(3)引导定语从句的词叫关系词，分为关系代词和关系副词。关系词的作用：1)引导定语从句，连接主句和从句，相当于一个连词；2)必在从句中作某个句子成份（可以做主语，宾语，表语，定语，状语）常用的关系代词:that、which、who、whom、whose、as(其中whose只能做定语,which和what也可以做定语)常用的关系副词（在从句中只作状语）:when、why、whereEx.)Hewaslate.That'sbecausehegotuplate..Hegotuplate.That'swhyhewaslate.(表语从句)(thereason)why/forwhichhewaslate.(定语从句)比较：Hereissobigastoneasnoonecanlift.（定语从句）Hereissobigastonethatnoonecanliftit.（结果状语从句）Thereareoccasionswhenjokingisnotpermissible.●关系代词作介词宾语:关系代词在定语从句中用作介词宾语时,介词可放于从句之首,也可放于从句之末.但以放于句首较为正式.（介词前置，必须注意不影响动词词组的含义。关系代词who和that用作介词宾语时,介词必须放在句末.）Thisisthebookforwhichyouasked.=Thisisthebook(that/which)youaskedfor.Thisisthegirlwhomtheyarelookingafter.(介词after与look构成固定词组，不可前置。lookat,lookfor,lookafter,takecareof等)当先行词为way时，定语从句常用that,inwhich,或how引导，that常可以省略。way后的定语从句的引导词不用时较多。但如果关系词在句中作主语或宾语时，则用which或that引导。如:Thisistheway(that)/inwhichIdosuchthings.比较:Pleasedotheexperimentintheway（that/which）Ihaveshownyou.Ⅳ.限制性定语从句与非限制性定语从句的区别：1.形式上，非限制性定语从句往往用逗号隔开。2.语法上，非限制性定语从句一般不用that.3.语义上，限制性定语从句与先行词关系紧密，起限定作用，如果去掉了这个定语从句，整个句子就不完整或者会改变意思；而非限制性定语从句与先行词关系不是很紧密，对先行词起补充说明或描述的作用。ThisisthebookIlikebest.这就是我最喜欢的那本书。Beijing,whichhasbeenChina'scapitalformorethan800years,isrichinculturalandhistoricrelics.北京是中国八百年之久的古都，它有着丰富的文化和历史遗产。4.翻译时，限制性定语从句可译为一句（较短的一般译为的字结构）；而非限制性定语从句可译为两句。（见上句翻译）比较:Hehasasister,whoisamusician.Hehasasisterwhoisamusician.引导非限制性定语从句的关系代词，指人时用who,whom,whose,指物时用which,whose;关系副词when，where,why,etc.1.Hestudiedhardatschoolwhenhewasyoung,whichleadstohissuccessinhislaterlife.2.Tom'sfather,whoarrivedjustnow,isafamousscientist.3.Theysetupaseparatestateoftheirown,wheretheywouldbefreetokeepNegroesasslaves.4.Hewasproud,whichhisbrotherneverwas.Ⅴ.几个易混淆的关系代词的比较:●that&which: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，这里介绍宜用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.Thelastplace(that)wevisitedwasthechemicalworks.Youcantakeany(=whichever)seatthatisfree.IhopethelittlethingthatIcandowillbeofsomehelptothem.比较*Thisisoneofthebestnovelsthatwerepublishedlastyear.*Thisistheonlyoneofthebestnovelsthatwaspublishedlastyear.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.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.(B)who&that:who和that指代人时，有些情况宜用who,而不宜用that①先行词为anyone,anybody,those,all,one,ones,they,he,people时.如：1.ThepersonIwanttolearnfromistheonewhostudieshardandworkswell.2.Anyonewho(=Whoever)failedtocometothemeetingyesterdaymustgivehisreason.3.Thosewhoarenotfitfortheirworkshouldleaveofficeatonce4.Idon'tliketheones(=those)whotalkbig.5.Personswhoarequarrelsomearedespised.②在Therebe结构中，修饰主语的定语从句宜用关系代词who指代人.如：1.Thereisagentlemanwhowantstoseeyou.2.Thereareseveralstudentsinourclasswhoarestillnotsureabouttheuseofattributiveclauses.③当先行词有较长的后置定语时.如：1.ImetaforeignerintheparkyesterdayafternoonwhocouldspeakChineseverywell.④一个句子中带有两个定语从句，其中一个定语从句的关系代词是that,另一个则宜用who,以免重复.如：1.Thestudentthatwaspraisedatyesterday'smeetingisthemonitorwhoisverymodestandworksveryhard.●as&which:as&which引导非限制性定语从句的区别：①位置的不同：which引导的定语从句只置于所限制的句子后；as位置较灵活，也就是说as可置于所限制的句子前面；插在句子中或放在句子后。如：1.