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•Teacherswhoarekindarepopularwiththestudents.•Mr.Wang,whoiskind,ispopularwiththestudents.分析两种定语从句省略后的结果:限制性定语从句省略后主语所指就不明确，所以不能省略。非限制性定语从句省略后意义仍然完整，所以可以省略。形式作用能否省略翻译限制性定语从句非限制性定语从句逗号隔开修饰限定补充解释能不能…的两个句子无逗号•非限制性定语从句是先行词的附加说明,去掉了也不会影响主句意思,它与主句之间通常用逗号分开。•引导“非限定”的关系词有：1.指人时：2.指物时：which（可指某个词也可指整个主句，从句只能位于主句之后）as（表示正如，可位于主句前或主句后）3.指地点时：4.指时间时：5.指原因时：非限制性定语从句的用法SeeVic.En.P66-67who,whom,whosewhich,aswhere=相应介词+whichwhen=相应介词+whichforwhich（切不可用why）1.Thefamousbasketballstar,_____isanAmerican,cametoChinayesterday.2.Inthosedays,sheusedtogotoMr.Black,with______shehadawonderfultime.3.Iboughtacaryesterday,______costmealot.4.Xi’an,______Ivisitedlastyear,isaniceoldcity.5.HewillcometoseemenextJuly,_______hewon’tbesobusy.6.Theschool,_______Ioncestudied,wasbuiltthirtyyearsago.7.Johnsaidhe’dbeenworkingintheofficeforanhour,_______wastrue.8.Themanager’sdaughter,_______nameisAnn,gavemeapatientsmile.whowhomwhichwhich课堂练习whenwherewhichwhose▲在ofwhich/whom之前可以使用表达数量或定位的数词或代词1.Iamdoingdifferenttypesofexercises,allof______arequitehelpfultomyhealth.2.Manypeople,someof_______arenotoverweight,aregoingondiets.3.Thereare54studentsinmyclass,threeof_______comefromUS.Otherexamples:whichwhomwhom“非限定”使用须知1.从句中所有的关系词都不可省略2.从句通常不能用that引导3.在“非限定”中,指人的关系代词作宾语时,只能用宾格whom,不能用who替换,也不能省略。4.从句不能用why引导,要用forwhich代替why5.从句置于句首时,不能用which引导;而要用关系代词as引导(as可放主句前,也可放主句后)要点归纳1)Ihaveasisterwhoworksinahospital.我有一位在医院工作的姐姐。（不只一位姐姐）2)Ihaveasister,whoworksinahospital.我有一位姐姐，她在医院工作。（只有一位姐姐）注意1：有时同一个限制性从句变为非限制性从句会改变全句的意思。•Hisfather,whoworksinBeijing,camebackyesterday.•Shanghai,whichisinEastChina,isdevelopingrapidly.注意2:当先行词是地名人名、世界上独一无二的事物或家庭唯一成员时，通常只用非限制性定语从句。as和which可指代整个主句(=andthis/andthat)as可放在句中或句首,which只放在句中•_____weknow,smokingisharmfultoone'shealth.•Thesunheatstheearth,______isveryimportanttous.Aswhich注意3:as/which引导非限定性定语从句的区别关系代词as在定语从句中指代整件事，充当句中的主语或者宾语，它经常和thesame,such,as一起搭配使用，共同构成一个固定词组。1.Asweallknow,heisafamousscientist.2.Asisexpected,heisadiligentboy.3.Shehasthesamebookasyouhave.as引导非限制性从句，常意为“正如”。可出现在句首、句中、句末。常见结构有：•asisknowntoall•asisoftenthecase•asmight/couldbeexpected•ashasbeensaidbefore•ashasbeenmentionedabove•ashasbeenpointedout•ascanbeimagined•ascanbeseen(fromthesefigures)•asoftenhappens•aswillbeshown这是常有的事正如人们所预料的正如上面所提到的正如前面所说的正如所指出的正如…所示•Theearthisround.____isknowntoall.•Theearthisround,_________isknowntoall.•____isknowntoall,theearthisround.•____isknowntoallthattheearthisround.•____isknowntoallisthattheearthisround.Itwhich/asAsItCompare:(定从)(形式主语)What____weexpected,hemadealongspeechAAsBThatCWhichDItHemadealongspeech,_______wasunexpected.AasBthatCwhichDit当主句和从句语义一致时，用as；反之，用which来引导非限制性定语从句。AC•ThisisthesamebookasIlost.•ThisisthesamebookthatIlost.这本书和我丢的那本一模一样。这本书就是我丢的那本。注意4：非限制性定语从句和简单句的比较1)Hefailedintheexam._______madehisparentsangry.2)Hefailedintheexam,_______madehisparentsangry.3)Hehastwosons.Bothof_______areteachers.4)Hehastwosons,bothof_______areteachers.Thiswhichwhomthem×that注意5：定语从句和其他从句的比较•Putthebook_____itiswhenyouhavefinishedreading.A.whichB.whereC.inwhichD.attheplace(地点状语从句)•Whenyoureadthebook,you’dbettermakeamark_____youhaveanyquestions.A.atwhichB.atwhereC.theplacewhereD.where(地点状语从句)1.Itisreportedthattwoschools,___arebeingbuiltinmyhometown,willopennextyear.(2007四川)A.theybothB.whichbothC.bothofthemD.bothofwhich2.Ihavemanyfriends,some___arebusinessmen.(2005全国)A.whyB.fromwhichC.whoofD.ofwhom3.Lastweek,onlytwopeoplecametolookatthehouse,____wantedtobuyit.(07安徽)A.noneofthemB.bothofthemC.neitherofwhomD.noneofwhom4.Thefactoryproduceshalfamillionpairsofshoeseveryyear,80%_____aresoldabroad.(2004辽宁)A.ofwhichB.whichofC.ofthemD.ofthat5.Iwalkedinourgarden,____TomandJimweretyingabigsignontooneofthetrees.(05辽宁)A.whichB.whenC.whereD.that6.Greatchangeshavetakenplaceinthatschool.Itisnolongerwhatitwas20yearsago,____itwassopoorlyequipped.(05安徽)A.whenB.whichC.whatD.that7.Jimpassedthedrivingtest,____surprisedeverybodyintheoffice.(05浙江)A.whichB.thatC.thisD.it1Reviewthegrammarandbeabletouseitcorrectly.2FinishEx2-3onP41inTb.3PreviewUsingLanguageonP43-44andfinishEx1-2onP43.