同位语从句讲解.ppt

Grammar同位语是句子成分的一种,它位于名词、代词后面,说明它们的性质和情况,它可以由名词、代词、名词性短语或从句充当。同位语的表现形式有以下几种：(1)名词Tom,ourmonitor,isahandsomeboy.(2)代词Imyselfwilldotheexperiment.(3)数词Sheistheoldestamongthemsix.(4)从句Hetoldmethenewsthattheplanehadexploded.他告诉我飞机爆炸的消息。(5)由suchas,thatis引导Somesubjects,suchasmathsandphysics,areverydifficulttolearn.某些学科,例如数学和物理,是很难学的。(6)由of引导ThecityofBeijinghasbeengreatlychangedsince2000.自从2000年以来,北京市发生了很大的变化。(7)由or引导Thefreezingtemperature,orfreezingpoint,isthetemperatureatwhichwaterfreezesunderordinarypressure.结冰温度即冰点,是水在常压下结冰时的温度。同位语从句theAppositiveclause(1)同位语从句的定义在复合句中用作同位语的从句称为同位语从句。同位语从句是名词性从句的一种。它在句中起同位语的作用。它一般放在fact,news,idea,truth,hope,problem,information,belief,thought,doubt,promise,question等名词的后面,对前面的名词作进一步的解释,说明前面名词的具体含义。引导同位语从句的词有连词that,连接副词how,when,where,whether等。e.g.Thehopethathemayrecoverisnotgoneyet.Theproblemwhetherweshouldcontinuetodotheexperimenthasbeensolved.Ihavenoideawhenhewillcomeback.同位语从句有时被别的词把它和名词隔开：⑵同位语从句的表现形式:①由that引导Thefactthatyouhaven’tenoughtimetodotheworkissimplyunbelievable.Thehopethathemaycomehereisnotgoneyet.ThenewsthathehasbeenelectedpresidentoftheUnitedStatesistrue.Thetruththatheavyobjectsandlightobjectsfallatthesamespeedisknowntoall.Theproblemthatshelaterdevelopedaseriouslungdiseasebotheredscientists.②由whether引导Thequestionwhetherweneedmoretimetodotheworkhasnotbeendiscussed.③由when引导Ihavenoideawhentheywillgo.⑶有时可用namely(即),thatistosay(也就是说),inotherwords(换句话说),thatis(那就是),forexample等引出同位语,说明其前面的名词或代词。有时同位语直接跟在名词或代词的后面。Hetoldusthegoodnews,namely,themuseumisopentoall.ThereisonlyonewayofimprovingyourEnglish,thatis,topracticemore.AltogetherDollyhadlivedforsixyears,halfthelengthofthelifeoftheoriginalsheep.⑷同位语从句与定语从句的区别:同位语从句与定语从句在使用中常常混淆,我们可以从以下几个方面区别它们:①同位语从句说明的名词大都是抽象名词;定语从句所修饰、限定的名词或代词有抽象的也有不抽象的。WeexpressthehopethattheywillcometovisitChinaagain.(同位语从句)Thosewhowanttogopleasesigntheirnameshere.(定语从句)②同位语从句所说明的名词与从句没有逻辑关系,定语从句所限定的名词是从句逻辑上的主语、宾语、表语、定语、状语等。Thenewsthattheywonthematchistrue.(同位语从句,news和从句没有逻辑关系)Thenewsthatyoutoldusyesterdayistrue