定语从句theAttributiveClause定语从句在句中做定语，修饰一个名词或代词。被修饰的名词或代词为先行词。定语从句在先行词之后，由关系代词或关系副词引导。Heisthemanwho/thatwantstoseeyou.先行词关系代词限制性和非限制性定语从句1)限制性定语从句与先行词关系密切，去掉它主句意思往往不明确；非限制性定语从句是对先行词的补充说明，它与主句之间通常用逗号分开，例如：Shefoundthenecklacethatshelosttwoweeksago.YesterdayImetLiPing,wholookedverytired.（限制）（非限制）关系代词有who,whom,whose,that,which,as关系副词有when,where,why1、who,whom,that先行词是表示人的名词或代词ShelookedatJeff,whowaswavinghisarms.（who在从句中作主语）Luckilynoneofthepeople(whom/that/who)Iknowwerekilledintheearthquake.（whom/that/who在从句中做宾语)2)Whose用来指人或物，在从句中作定语。指物时，相当于ofwhich。例如：Doyouknowtheboywhoseparentsareonholiday?Ilikethebookwhosecoverisblue.(=Ilikethebookthecoverofwhichisblue.=Ilikethebookofwhichthecoverisblue.)3)which,that代替的先行词是表示事物的名词或代词。Myparentsliveinahousewhich/thatismorethan100yearsold.（which/that在从句中作主语）YesterdayEmilywaswearingthenewdress(which/that)Igaveher.(which/that在句中作宾语)定语从句中宜用that，不宜用which的情况：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。宜用that，不用which。1、先行词为不定代词时，anything，nothing,theone,all,much,few,any,littleWeshoulddoallthatisusefultothepeople.There'snothingthatcanbesaidaboutit.2、先行词为数词时YesterdayIcaughttwofishandputtheminabasinofwater.Nowyoucanseethetwothatarestillalive.3、先行词既有人又有物时，Thewriterandhisnovelthatyouhavejusttalkedaboutisreallywellknown.4、先行词是序数词或被序数词修饰时。WhenwetalkaboutWuxi,thefirstthatcomesintomindisTaiLake.Thisisthethirdfilmthathasbeenshowninourschoolthisterm.5、先行词是最高级或被最高级修饰时。Themostimportantthingthatshouldbedonenowishowtostophimfromgoingon.6、先行词被only,any,few,little,no,all,oneof,just,very等词修饰时，宜用that。Youcantakeanyseatthatisfree.That'stheverywordthatiswronglyused.7、如有两个从句，一个已用which，另一个用that。Edisonbuiltupafactorywhichproducedthingsthathadneverbeenseenbefore.8、主句是Therebe结构。There'sstillaseatinthecornerthatisstillfree.9、先行词为表语，或关系代词是定语从句的表语时。That'sagoodbookthatwillhelpyoualot.定语从句中用which不用that的情况1、当关系代词前面有介词时。Azooisaparkinwhichmanykindsofanimalsarekeptforexhibition.IsthistheroominwhichMr.Whitelives?２、在非限制性定语从句中。Crusoe'sdog,whichwasnowveryold,becameillanddied.３、在一个句子中有两个定语从句。LetmeshowyouthenovelthatIborrowedfromthelibrarywhichwasnewlyopentous.４、当关系代词后面带有插入语时。HereistheEnglishgrammarwhich,asIhavetoldyou,willhelpimproveyourEnglish.定语从句中用who而不用that的情况1、先行词为one,ones,anyone或those时。Anyonewhofailedtocometothemeetingyesterdaymustgivehisreason.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。There'sagentlemanwhowantstoseeyou３、当先行词有较长的后置定语时。ImetaforeignerintheparkyesterdayafternoonwhocouldspeakChinesewell.４、一个句子中两个定语从句或有who的特殊疑问句，避免重复。Thestudentthatwaspraisedatyesterday‘smeetingisthemonitorwhoworksveryhard.Whoisthemanthatisspeakingtoourteacher?关系副词在从句中作状语。when,where,why1958wastheyearwhen(inwhich)Spielbergmadehisfirstrealfilm.Pleasegivemethereasonwhy(forwhich)youwerelatethistime.Thisisthereasonthat...
