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1、PeriodFive限制性定语从句与非限制性定语从句1、限制性定语从句:从句与主句关系密切,去掉从句,主句意义不完整,甚至不合逻辑。e.g.Iwastheonlypersoninourofficewhowasinvited.(去掉定语从句,意思就不完整)2、非限制性定语从句:从句对先行词关系不密切,去掉定从句,意思仍然完整。形式上用逗号隔开,与限制性定语从句一样,非限制性定语从句也可用关系代词who,which,whom,whose,as和关系副词when,where,why引导。that不引导非限制性定语从句。e.g.Tom’sfather,whoisovers
2、ixty,stillworksharddayandnight.(who引导非限制性定语从句,整个句子可分成两句来翻译)3.在which引导的非限制性定语从句,先行词可以是一个名词或代词,也可以是句子的一部分,甚至整个句子。(1)Mynewcar,Ipaidseveralthousanddollarsfor,isn’trunningwell.先行词是(2)Hesaidthathehadneverseenherbefore,wasnottrue.先行词是4.as引导定语从句时的用法(1)as引导限制性定语从句通常用于thesame…as,such…as结构中。e.g.
3、SuchmachinesasareusedinourworkshoparemadeinChina.我们车间使用的这种机器是中国制造的。________________________________________________我要一件跟我朋友一样的衬衫。(2)as引导非限制性定语从句既可放在主句之前,也可放在主句之后,用来修饰整个句子。常用下列句型:asisknowntoall,asissaid,asisreported,asisannounced,asweallknow,asIexpect等。e.g.AsIexpected,hegotthefirstplac
4、eagaininthismid-termexamination.注意:"as"和"which"都可指代主句中的一部分或者整个句子的内容,在从句中作主语、宾语、或表语。一般情况下可互换,但是在下列情况下只能用as.a.放于句首只能用asb.表示"正如,正像"之意时,只能用as.几个特殊的定语从句句型:1.way(方式,方法)后常用inwhich或that或省略来引导定语从句Doyouknowtheway(inwhich/that/how)heworkedouttheproblem?2.Hestoodatthewindow,fromwherehecouldseewha
5、twashappening.Itmayrain,inwhichcasethematchwillbeputoff.3.当先行词为time,moment,day等,并在从句中作状语时,从句也可以用that引导,that也常省略。Itwasthefirsttimewehadstayedupsolate.Themomenthesentthemail,Johnrealizedwhatamistakehehadmade.Practice一、填上合适的关系代词或关系副词1.Acountryisanation_________hasitsowngovernment,landand
6、population.2.I’velookedthewordsupinthedictionary_______Iborrowedfrommyteacher.3.Theman__havemademuchmoneydonotknowwhattodowiththeirmoney.4.Wehaven’tfoundalanguage______wouldbeacceptedbypeople.25.Hewenttoafriend_______knewalotaboutmoneymatters.6.Handsignscanbeusefulinplaces______arever
7、ynoisyandinplaces______areveryquiet.7.MrBlackwouldneverforgettheday_____hewasbitterlypunished.8.Thereason_______hedidnotbuythemodernpaintingwasthatitwasnotapaintingatall.9.ThewinterOlympicsarealwaysheldinamountainouscountry______thereisplentyofsnow.10.Thegreeting“Goodafternoon”isgiven
8、toany