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定语从句◆英语谚语欣赏1.Hewhoknowsnothingbutpretendstoknoweverythingisindeedagood-for–nothing.不懂装懂，一事无成.2.It’sthefirststepthatcosts.千里之行，始于足下3.Hethatmakeshimselfasheepshallbeeatenbythewolf.甘当小绵羊，迟早要喂狼.Ⅰ.概念：(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常用的关系副词（在从句中只作状语）:when、why、whereThestudentwhoansweredthequestionwasJohn.Iknowthereasonwhyhewassoangry.Theboy(whom)youaretalkingtoismybrother.I'dlikearoomwhosewindowlooksoutoverthesea.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。Ⅱ.几个关系代词的基本用法：●that:可指人或物；在定语从句中作主语，宾语，表语。(指人时，相当于who或whom；指物时，相当于which)(一般不用于非限制性定语从句;不可置于介词后作宾语)如：1.Aletterthat/whichiswritteninpencilisdifficulttoread.(主语)2.Doyouknowthegentlemanthat/whospokejustnow?3.Youcantakeanything(that)youlike.（宾语）4.Whatisthequestion(that/which)theyaretalkingabout?5.Hereistheman(who/whom/that)youwanttosee.6.She'snolongerthegirl(that)sheusedtobebefore.（表语）7.Ourhometownisnolongertheone(that)itusedtobe.=Ourhometownisnotthesameasitusedtobe.=Ourhometownisdifferentfromwhatitusedtobe。=Ourhometownisnotwhatitusedtobe.●which:指物；在定语从句中作主语，宾语，表语，定语。如：1.Thebookwhich/thatwasonthedeskwasboughtbymyfather.（主语）2.Thebook(which/that)Iboughtyesterdayisveryinteresting.（宾语）3.Thefactoryinwhichhisfatherworksisfarfromhere.4.Hewasproud,whichhisbrotherneverwas.（表语）5.Tomspentfouryearsincollege,duringwhichtimehelearnedFrench.（定语）6.Hemaybelate,inwhichcaseweoughttowaitforhim.●who,whom,whose:who:主格,在从句中作主语，在口语或非正式用法中作宾语;只可指人whom:宾格，在从句中作宾语;只可指人whose:属格，在从句中作定语，可指人也可指物。Ilikethestudentswho/thatworkhard.（主语）Allwhoheardthestorywereamazed.(代词如he,they,any,those,all,one等后多用who.)Chaplin,forwhomlifehadoncebeenveryhard,wasasuccessasanactor.（宾语）He'samanfromwhomweshouldlearn.=He'saman(whom/who/that)weshouldlearnfrom.Achildwhoseparentsaredeadiscalledanorphan.（指人）I'dlikearoomwhosewindowfacessouth.（指物）=I'dlikearoomofwhichthewindowfacessouth.=I'dlikearoomthewindowofwhichfacessouth.ThereisateapotshapedlikeaChineseduck,outofwhosemouthteaissupposedtocome1.关系代词whose，引导定语从句时，既可指人，又可指物，在从句中只能作定语；ofwhom只能指人；ofwhich只能指物，有时whose可以与ofwhom和ofwhich互换使用。如：ThegirlwhosehairisgoldenisfromEngland.头发金色的那个女孩是英国人。Thehousewhosedoorsaregreenisanofficebuilding.门是绿色的那座房子是办公楼。2.“介词+whose+名词”引导定语从句。如：Ilovemymotherland,forwhosegoodfutureIwillworkhard.我爱我的祖国，为了她美好的未来我要努力工作。3.在下列情况下，一般只用ofwhom和ofwhich。(1)定语从句的主语是few,little,some,most,many,much等时，一般只用ofwhom和ofwhich。Intheroomarelotsofpeople,manyofwhomIdon’tknow.房间里有很多人，很多人我不认识。Hehasalotofstory-books,afewofwhichIhaveneverread.他有很多故事书，有几本故事书我还从未看过。(2)定语从句的主语是数词、形容词的最高级时，一般只用ofwhom和ofwhich。如：Theoldmanhasthreechildren,twoofwhomarecollegestudentsandoneofwhomisamanager.那个老人有三个小孩，其中两个是大学生，另一个是经理。(3)定语从句的主语是all,none,both,neither,each等不定代词时，一般只用ofwhom和ofwhich。如：Therearefiftystudentsinourclass,allofwhomareworkinghard.我们班有五十个学生，所有这五十个学生学习都刻苦。Heplantedtwotreeslastyear,bothofwhicharegrowingwell.去年他栽了两棵树，这两棵树都长得好。(4)在定语从句中作表语的定语时，一般只用ofwhom和ofwhich。如：Hehasthreebrothers,ofwhomLiLeiistheyoungestone.它有三兄弟，李蕾是他们中最小的一个。TherearemanycountriesinAsia,ofwhichChinaisthelargestone.亚洲有很多国家，中国是最大的一个。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.）关系代词前介词选择三原则：一先，二动，三意义（重中之重）1.一先，即根据定语从句中介词与先行词的搭配关系选择。IneverforgetthedayonwhichIcametothisschool.(ontheday)2.二动，即根据定语从句中谓语动词与介词的搭配关系选择。ThisistheiPadonwhichIspent3000yuan.(spendmoneyonsth.)3.三意义，即根据定语从句的意义来确定介词。Thisismypairofglasses,withoutwhichIcannotseeclearly.Thisisthebookforwhichyouasked.=Thisisthebook(that/which)youaskedfor.DoyouknowthepersonwithwhomIshookhands？=Doyouknowtheperson(whom/who/that)Ishookhandswith?Thebeginningofagriculturewasabigstepinhumanprogresswithwhichnothingcouldcompareuntilourinformationage.Inthedarkstreet,therewasn'tasinglepersontowhomshecouldturnforhelp.Isthisthefactorytowhichyoupaidavisitlastweek?Isthisfactorytheonetowhichyoupaidavisitlastweek?Thisisthegirlwhomtheyarelookingafter.(介词after与look构成固定词组，不可前置。lookat,lookfor,lookafter,takecareof,hearof\about\from,carefor,lookforward,payattentionto,listento等)●as的用法:(as引导定语从句,在定语从句中作主语、宾语、表语)①如为限制性的，多用于thesame…as;thesameas；such…as…;asmany/muchas；so…as等结构中。如：※Ihavethesamebookasyou(have).我有一本和你的一样的书。Herattitudetohimwasquitethesameasithadalwaysbeen.(关系代词as和指示代词same连用,在从句中用作表语,先行词是same.).---Whydidn'tyoumentionthatinfaceofthepolicejustnow?---Ithoughtitwassuchaminordetailaswashardlyworthmentioning.Wewillonlydiscusssuchproblemsashavesomethingtodowithourowninterests.Don'tdosuchthingsasyouarenotsureabout.Thereisnosuchplaceasyoudreamofinallthisworld.比较：Iliveinthesamehousethatheusedtolivein.I'mwearingthesameshirtasyouworeyesterday.比较：Hereissobigastoneasnoonecanlift.（定语从句）Hereissobigastonethatnoonecanliftit.（结果状语从句）②如为非限制性的，多单独引导一个定语从句，这种定语从句可置于句首，句中或句尾，译为正如，这一点。（动词常为know,see,expect,pointout,etc.）Asweallknow,smokingisharmfultoone'shealth.(as作宾语)=Asisknowntoall,smokingisharmfultoone'shealth.（as作主语）=It'sknowntoallthatsmokingisharmfultoone'