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1、人教课标高二选修8Unit2Unit2CloningLookatthesentences.Thephraseandclauseunderlinedareusedasappositive(同位语).1.AlthoughDollylivedsixandahalfyears,halfthelengthofthelifeoftheoriginalsheep.2.Thefactthatsheseemedtodevelopnormallywasveryencouraging.Discoveringusefulst
2、ructures1.同位语theAppositive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。语法精解(一)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
3、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,isthetemperatureatwhichwater
4、freezesunderordinarypressure.结冰温度即冰点,是水在常压下结冰时的温度。1.Thereisclearevidence_____themostdifficultfeelingofalltointerpretisbodilypain.（上海2011）A.whatB.ifC.howD.that考例回顾[点拨]答案为D。that引导同位语从句，说明evidence的具体内容。2.Whenthenewscame_____thewarbrokeout,hedecidedtoservei
5、nthearmy.（辽宁2011）A.sinceB.whichC.thatD.because[点拨]答案为C。news与同位语从句分隔开，that引导的同位语从句说明news的具体内容。3.—Isthereanypossibility_____youcouldpickmeupattheairport?—Noproblem.（浙江2009）A.whenB.thatC.whetherD.what[点拨]答案为B。that引导同位语从句，说明possibility的具体内容。4.Weshouldconsid
6、erthestudents’request_____theschoollibraryprovidemorebooksonpopularscience.（重庆2009）A.thatB.whenC.whichD.where[点拨]答案为A。that引导同位语从句，说明request的具体内容，从句的谓语用虚拟语气。2.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。语法精解(二)它一般放在
7、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,what等。e.g.Thehopethathemayrecoverisnotgoneyet.Theproblemwhetherweshouldcontinuetodotheexperim
8、enthasbeensolved.Ihavenoideawhenhewillcomeback.同位语从句有时被别的词把它和名词隔开：注意:ThestorygoesthatWilliamTellkilledthekingwithanarrow.Wordcamethattheirteamhadwon.(2)同位语从句的表现形式:①由that引导Thefactthatyoudon’thaveenoughtimetodotheworkissimplyunbeli
