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限制性定语从句与非限制性定语从句限定性定语从句与非限定性定语从句1.限制性定语从句不用逗号与主句隔开，对所修饰的先行词起修饰和限定作用，去掉后会使主句意义不完整或不太清楚。翻译成…..的….2.非限制性定语从句需要用逗号与主句隔开，只对所修饰的词语或主句起补充说明作用，去掉后对主句影响不大。翻译成二个并列句。Eg:Hewastheonlypersonwhostudiedabroad.Eg:Theboywenttoschoollateagain,whichmadehisteacherveryangry.1.A.ThisistheplacewhereIlivedtenyearsago.B.SheisgoingtospendthewinterholidayinMacao,whichreturnedtoChinain1999.2.A.HeisamanwhoIcanaskforhelp.B.Hisfather,whoworksinBeijing,camebackyesterday.引导非限定性定语从句的关系词如下表：先行词成分主格宾格所有格人whowhom名/代+ofwhomofwhom+名/代whose物whichas（正如）which名/代+ofwhichofwhich+名/代whose注意：1.即使引导词作宾语也不能省略。2.引导非限定性定语从句的关系副词主要when,where,(注：that.why不能用于非限定性从句)•限制性定语从句举例：•(1)TheteachertoldmethatTomwastheonlypersonthatIcoulddependon.•非限制性定语从句举例：•(1)Hismother,wholoveshimverymuch,isstrictwithhim.•要注意区分以下几个句子的不同•(1)Hisbrotherwhoisnowadoctoralwaysencourageshimtogotocollege.•他那当医生的哥哥常鼓励他要考上大学。（他还有其他的哥哥）•(2)Hisbrother,whoisnowadoctor,alwaysencourageshimtogotocollege.•他的哥哥是当医生的，常鼓励他要考上大学。（他只有一个哥哥）1Hemadethesamemistakesagain,_____madehisparentsveryangry.2YesterdayIboughtadictionary,_______costmemorethan100yuan.3MrSmith,_______gaveatalkseveralmonthsago,willcomeagain.4Myunclehascomebackfromabroad,________Ihaven’tmetforalongtime.whichwhichwhowhomFillintheblanks1、在非限制性定语从句中，指事物用which，指人用who或whom.•1.Herbag,sheputallhermoney,hasbeenstolen.•2.Thisisthering，shespent1000dollars.•3.XiaoWang,Iwenttotheconcert,enjoyedhimselfverymuch.•常见的不可拆开的短语:carefor,lookfor,lookafter,sendfor,hearfrom/of/about,•getthrough,dealwith,inwhichonwhichwithwhom2、在介词后面，指事物用which，指人用whom.•3当先行词为前面的整个主句时，用关系代词which引导非限制性定语从句，这时从句谓语动词要用第三人称单数。••HeseemsnottohavegraspedwhatImeant,greatlyupsetsme.•他似乎没抓住我的意思，这使我心烦。Liquidwaterchangestovapor,iscalledevaporation.•液态水变为蒸汽，这就叫做蒸发。whichwhich非限定性定语从句中as和which相同之处和不同之处相同之处：As和which都可以在定语从句中做主语或者宾语，代表前面整个句子。Eg:Hewashonest,as/whichwecansee.不同之处：as引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思•(1)Asisknowntoall,Chinaisadevelopingcountry.•(2)Heisfromthesouth,aswecanseefromhisaccent.•(3)John,asyouknow,isafamouswriter.•(4)HehasbeentoParismorethanseveraltimes,whichIdon’tbelieve.•3.关系代词as既可以引导限定性定语从句，也可以引导非限定性定语从句，as在句中作主语、宾语、或表语。such+名词+as…像….一样的，像….之类thesame+名词+as….和…..同样的eg:wehavefoundsuchmaterialsasareusedintheirfactory.我们已经找到了像他们工厂里用的那种材料。eg:Thesehousesaresoldatsuchalowpriceaspeopleexpected.这些房子以人们期望的低价出售。eg:Heisnotthesamemanashewas.他和过去不同了。注意：1、such….as…(定语从句）像……那样Such…..that……(状语从句)如此…….以至于ThisissuchaneasyquestionasIcananswer.(定语从句)这是一个我能回答的简单问题。ThisissuchaneasyquestionthatIcanaswerit.（状语从句）这是个简单的问题，我能回答。2、thesame…..as….表示相似的东西thesame….that….表示同一人或物eg:ThisisthesameknifeasIlost.eg:ThisisthesmeknifethatIlost.•4as引导非限制性定语从句常见结构有•asiswellknown/isknowntoall•asissaidbefore•asweallcansee•asisexpected/hoped/supposed,.众所周知如前所述正如我们所看到的正如所盼望的/希望的/料想的Conclusion在非限制性定语从句中,一些表达数量或定位的数词或代词.如all/some/one/both/neither/none/any/either等可与of构成介词词组修饰先行词。如先行词指人则用whom，如先行词指物则用which引导从句。1.Iamdoingdifferenttypesofexercises,allof______arequitehelpfultomyhealth.2.Manypeople,someof______arenotoverweight,aregoingondiets.3.Thereare54studentsinmyclass,threeof_______comefromUS.Otherexampleswhichwhomwhom1.LiuMeiwhoismyclassmate.2.Therearemanypeopleagreewiththeidea.3.Allwhatisneededisasupplyofoil4.AsisknowntoallthattheChinesepeoplearebraveandhardworking.5.Thisissuchaheavystonethatnobodycanlift.whothatas6)Lastweek,wewenttotheGreatWall,wherewehadagoodtimethere.7)Herparentswouldn'tlethermarryanyonewhichfamilywasverypoor.8)Thedayswhenwespenttogetherinthecountrysidewerewonderful.9)Thecompanywherehisfathermanagesisabigone.10)Idon'tthinkthereasonwhyheexplainedatthemeetingwasreasonable.whosewhich/thatwhich/thatwhich/thatGoodbye!