定語從句在復合句中充當定語成分的從句是定語從句,被定語從句修飾的詞稱為先行詞。按照英語語法規那么,定語從句通常放在先行詞后面，但也有特殊情況。1?引導定語從句的關系代詞(who,whom,whose,which,that,as)有三個作用：①連詞的作用，把主句和從句連接起來；②代詞的作用，指代所修飾的先行詞；③一定的語法作用,在從句中可以作主語、賓語、表語等成分。Ihaveafriendwholikeslisteningtoclassicalmusic.我有一個喜歡聽古典音樂的朋友。Heisthewriterwhomyoulookedforjustnow.他就是你剛才找的那個作家。考點：關系詞只能用that(1)領先行詞是all,anything,everything,something,nothing,much,little,none等不定代詞或被這些不定代詞修飾時，關系代詞一般要用thatothat在從句中充當賓語時也可以省略。Thafsall(that)Icoulddoatthattime.那是當時所有我能做的。(2)領先行詞被形容詞最高級、序數詞，以及theonly,thevery,theright,thelast等詞修飾時，關系代詞只能用that。ThisisthemosttouchingstorythatIhaveeverread.這是我讀過的最感人的故事。2.引導定語從句的關系副詞(when,where,why)等弓I導的定語從句分別用來修飾表時間、地點、原因等的先行詞。這些關系副詞在從句中均作狀語。Wewereveryhappyinthosedayswhenwestudiedinschool.在學校里上學的那些日子里，我們很快樂。Thisistheplacewheretheaccidenttookplacelastnight.這就是昨晚發生事故的地方。Idon'tknowthereasonwhyhedidn*tcometothemeetingyesterday.我不知道他昨天為什么沒有來參加會議。Al1shelikestodonowisdrivinghercaronthehighway.A.thisB.thatC.whatD.which【精析】B。題意:她現在喜歡做的是在高速公路上開車。當定語從句中的先行詞是all,any,every,some等不定代詞或被其修飾時,關系代詞要用that。應選B。Thereasonshewaslateisnotacceptable.A.thatB.whenC.whichD.why【精析】D。題意:她遲到的原因令人無法接受。關系副詞why可以引導定語從句修飾表示原因(reason)的先行詞，且why在從句中做狀語。應選D。LastweekIboughtanancientvase,priceisquitereasonable.A.whichB.whoseC.thatD.what【精析】B。題意:上星期我買了一只古花瓶，價錢相當公道。木句考查的是定語從句的用法。關系代詞whose可引導定語從句。whose是代詞的所有格，它既可以指代人，也可以指代物。當指代物時，它相當于”...ofwhich”；指代人時相當于"…ofwhom”。本句可改寫為：LastweekIboughtanancientvase,thepriceofwhichisquitereasonable.AfterlivinginParisforfiftyyearshereturnedtothesmalltownhelivedasachild.

A.whichB.whereC.thatD.when【精析】B。定語從句題。句意:在巴黎生活了50年后，他回到了小時候生活過的小城鎮。關系副詞where引導定語從句修飾thesmalltown,并且在從句中做地點狀語，相當于inwhich。選項A、C和D均不能做地點狀語。定語從句習題天天練Thereasonhewaslatewashelosttheway.A.why；thatB.that；whyC.why；becauseD.that；becauseDoyourememberthedaywespentclimbingMountTailastsummer?A.that；goingB.when；ingoingC.onwhich；goingD.which；togoTheoldmanhasadaughter,abetterdaughterdoesnotexist.A.ofwhichB.withwhomC.whoseD.thanwhomA.ofwhichB.withwhomC.whoseD.thanwhomWhichisthebookyouboughtyesterday?D.theoneD.whereA.whichB.thatC.whatD.theoneD.whereThatistheverybookbelongstohim.A.thatB.whichC.whatTheartistthejudgegaveaprizeistheteacherIhavebeentaughtpaintingfortwoyears.A.fromwhom；bywhomB.towhom；whoC.from；whoD.towhom；bywhom_Whydoesshealwaysaskyouforhelp?_Thereisnooneelse,isthere?A.whototurntoB.shecanturntoC.forwhomtoturnD.forshetoturnholdthespecialcardwillbefreeofchargeforthisbook.A.PeopleB.ThosepeopleC.ThoseonesD.ThosewhoThedaysIspentinthecountrysideinmychildhoodwerethehappiesttimeIhadeverhadinmylife.D.that；thatD.whichwillA.when；whenB.where；