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定语从句用作定语的从句叫定语从句。定语从句所修饰的名（代）词叫作先行词。定语从句一般紧跟在先行词的后面。1.Thestudents(whodon’tstudyhard)willnotpass先行词定语从句theexam.主句:Thestudentswillnotpasstheexam.2.Thewoman(whomyousawinthepark)isour先行词定语从句Englishteacher.主句:ThewomanisourEnglishteacher.从句的主语：you从句的宾语：whom3.Ashoeshopisashop(whichsellsshoes).主句：Ashoeshopisashop.从句的主语:which4.Thebook(thatyouwant)isonthedesk.主句从句的主语:从句的宾语：Thebookisonthedesk.youthat引导定语从句的关系代词常见的有that,which,whowhom等。关系代词放在先行词和定语从句之间，起连接作用，同时又作定语从句的一个成份。Theman(that/whotoldusafunnystory)isinthenextroom.主语Ilostthebook((that/which)yougaveme).宾语归纳：that,即指人又指物，作主语或宾语。which,指物，作主语或宾语。who,whom指人,who作主语,whom作宾语。that,which,whom在定语从句中作宾语时，可省去。1)Aplaneisamachine________________canfly.2)Thecar_______________________myuncleboughtlastweekwasstolen.3)Thestudents________________don’tstudyhardwillnotpasstheexam.4)Thewoman___________________yousawintheparkisourEnglishteacher.5)Hetalkedhappilyaboutthemenandbooks______________interestedhimgreatlyintheschool.which/thatwhich/that///who/thatwhom/that///thatFillintheblanks.1.Istillremembertheday_________wespentintheforest.2.Istillremembertheday____________IfirstcametoBeijing.3.Thefactory_________wewillvisitislarge.4.Thefactory___________hisfatherworksislarge.5.I’llneverforgetthetime_____________weworkonthefarm.6.Thisisthehouse____________welivedlastyear.that/whichwhen/onwhichthat/whichwherewhen/atwhichwhere/inwhich归纳:关系副词when指时间,关系副词where指地点,在定语从句中作状语。即使先行词是时间地点,若作从句中的宾语，只能用关系代词that,which.Fillinthegaps:1.Theterribletyphoonkilledthepeopleandcattle_______wereinthefields.2.Thewindblewdownthetallesttree_______isinfrontofourschoolgate.3.Thisistheverything______Iwaslookingfor.4.Thisisthesecondnovel______Ihaveeverread.5.Thereisnothingintheworld_______canfrightenme.6.Whoistheman_______isreadingunderthetree?7.Myhometownisnotthesameone_______itusedtobetwentyyearsago.thatthatthat//that//thatthatthat二.在下列情况下只用that，不用which①先行词是all,everything,nothing,anything,little,much,theone等不定代词时Thereisnothing(that)Icando.Imeantheonethatwasbroughtyesterday.②先行词被all,any,every,no,some,little,much等词修饰时Ihavereadallthebooks(that)yougaveme.Youmaytakehomeanyofthesebooksthatyoulike.③先行词被序数词或形容词最高级修饰时Thisisthefirstcomposition(that)hehaswritteninEnglish.Thisisthebestnovel(that)Ihaveeverread.④先行词被theonly,thevery(正是,恰是),thesame,thelast修饰时Thewhitefloweristheonlyone(that)Ireallylike.Thisistheverybook(that)Iwanttofind.Thelastplace(that)wevisitedwasthehospital.ThisisthesamewatchthatIlostyesterday.⑤当先行词有两个或两个以上时,既有人又有物,定语从句用that引导(that既可指人也可指物)Hetalkedabouttheteachersandschoolsthathehadvisited.that不能引导非限制性定语从句that不能置于介词之后（介词后指物用which,指人用whom）关系代词作定语从句中系动词的表语时,或先行在主句中作表语Whatgreatchanges!Itisnotthecity(that)itwastenyearsago.Thisistheplacewhere(atwhich)Jackparkshiscar.二.关系副词.1.when,where,why指的是时间,地点,理由的名词在句中做状语.相当于”介词+which”.Hedidn’tknowthereasonwhy(forwhich)hewasdismissed.四.定语从句中的主谓一致定语从句中的谓语动词的人称和数与先行词保持一致。例如：1.Herearesuchsentencesasareoftenusedbythestudents.(as指代sentences,谓语动词用are)。2.I,whoamaPartymember,shouldworkhardforourcountry.(who指代I,谓语用am.)。3.Hewasoneofthestudentswhowerepraisedforit.(who指代thestudents)他是被表扬的学生之一。4.Hewastheonlyoneofthestudentswhowaspraisedforit.(who指theonlyone)他是唯一被表扬的学生。“介词＋关系代词”即“介词＋whom/which”引导定语从句应注意：1介词的选用至少要考虑以下的两个因素A.与先行词的搭配关系1）Iwillneverforgettheday_____________Ijoinedthearmy.2)Iwillneverforgetthedays____________Iworkedintheschool.3)Iwillneverforgettheyear____________mysonwenttocollege.4)Igothomeat7:00p.m.yesterday,____________mostpeoplehadhadsupper.onwhichduringwhichinwhichbywhichB.与谓语动词的搭配习惯1）Haveyoufoundthebook____________Ipaid29USdollars?2)Haveyoufoundthebook_____________Ispent29USdollars?3)Haveyoufoundthebook_____________welearntalot?4)Haveyoufoundthebook____________sheoftentalks?forwhichonwhichfromwhichaboutwhich2.“介词＋whom/which”与“whom/which/that/…＋介词”的转换。1）Thechaironwhichsheissittingismadeofwood.Thechair(which/that)sheissittingonismadeofwood.2)Isthisthebookwhichyouarelookingfor?介词for不能与look分开。3.way作先行词1)Theway(inwhich/that)helooksattheproblemsiswrong.4.表所有关系及整体中的一部分或全部时，用介词of,有时可用whose转换。1)Thereare100teachersinourschool,__________60arewomenteachers.2)Hehasthreechildren,two___________workasteachers.3)Thattablehasfourlegs,all_____________areveryshort.4)I’mpaintingahouse,theroof_____________isround.I’mpaintingahousewhoseroofis...5)Theyliveinahouse,_________windowsfacesouth.Theyliveinahouse,thewindows______________facesouth.ofwhomofwhomofwhichofwhichwhoseofwhich用介词＋关系代词填空1Theboywasstayingintheroom___________windowhecouldclimbdown.2.He’stheman____________Ilearntthenews.3.Who’sthecomrade____________youjustshookhands.4.Thereare52studentsinourclass,___________nearly40areLeaguemembers.5.Iknowaladythehusband____________isaNobelPrizewinner.6.Doyouknowthedriverwhocausedthetrafficaccident____________amanwaskilled.7.Thisistheway__________shestudiesEnglish.throughwhosefromwhomwithwhomofwhomofwhominwhichinwhich8.The5yuan_____________heboughtthebookwasgivenbyhisfriend.9.ThestoryaboutShakespeare,_________thisisoneexample,iswellwritten.10.Theoldmanalwayswearshisglasses__________________hecan’tseeanyt