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Iamaperson.Iamlackofconfidence.Iamapersonwhoislackofconfidence.Youneedtohaveatalkwithyourbestfriend.Atalkcanhelpyouspeakoutyourthought.Youneedtohaveatalk,whichcanhelpyouspeakoutyourthought，withyourbestfriend.改写理由：句是在给句中的人或物提供更多的信息，可以利用定语从句将两个句子合并成一个复合句。下列两组表达中，A和B哪一种更为合理紧凑呢？ABAB1.Iamapersonwhoislackofconfidence.2.Youneedtohaveatalk,whichcanhelpyouspeakoutyourthought，withyourbestfriend.定语从句是由一个句子充当定语，修饰复合句中某一名词或代词定语从句定语从句限制性定语从句和非限制性定语从句,限制性定语从句与主句关系密切，是被修饰词不可缺少的定语，一般不用逗号与主句隔开;非限制性定语从句是被修饰词的附加说明，它与主句之间常用逗号隔开限制性非限制性☼定语从句的定义：☼定语从句的分类：Sharing1☻Thesentencesyoufound(限制性定语从句和非限制性定语从句各一个）Iamapersonwhoislackofconfidence.定语从句先行词关系词☼被定语从句修饰的词叫先行词☼引导定语从句的词叫关系词定语从句的基本结构☼关系词的作用：连接主句与从句代替先行词在从句中充当一定的成分：代替person在从句中做主语Sharing2☻Thestructureofthesentencesyoufound关系代词的用法1.who指人，可在定语从句中作主语、宾语Areyoutheonewhosparklesinthenightlikefirefly.(AreyoutheonebySharondenAdel)关系代词作用分析：who代替先行词theone（人）在从句中做主语Sharing3☻Thesentencesyoufoundandyouranalysis:2.whom指人，在定语从句中作宾语Iknowthegirlwhomtheteacherisspeakingto.(P52exercisesbook)关系代词作用分析：whom代替先行词thegirl（人）在从句中做宾语（）Sharing4☻Thesentencesyoufoundandyouranalysis:3.whose可指人或物，在从句中作定语,意为“某人的......”或“某物的......”Workersbuiltsheltersforsurvivorswhosehomeshadbeendestroyed.关系代词作用分析：whose指代先行词survivors（人）在从句中做定语，相当于survivors’(Line35,P26Studentsbook)Sharing5☻Thesentencesyoufoundandyouranalysis:4.which指物，在定语从句中作主语、宾语或表语。关系代词作用分析：which指代先行词Beijing在从句中做主语ItwasfeltinBeijing,whichismorethantwohundredkilometersaway.(Line11,P26Studentsbook)Sharing6☻Thesentencesyoufoundandyouranalysis:Butthehillsthatweclimbedwerejustseasonsoutoftime.(SeasonsinthesunbyWestlife)关系代词作用分析：that指代先行词thehills（物）在从句中做宾语5.that指人或物，在定语从句中作主语、宾语或表语（）Sharing7☻Thesentencesyoufoundandyouranalysis:6.as也可作关系代词，在定语从句中作主语、宾语或表语，常常构成such…as,so…as,as…as…，thesame…as等结构Awisemanseldomtalksaboutsuchthingsashedoesn’tunderstand.关系代词作用分析：as指代先行词things在从句中做宾语(mysentence)Sharing8☻Thesentencesyoufoundandyouranalysis:Wehavelaunchedanotherman-madesatellite,whichisreportedontoday'snewspaper.Asweallknow,travelingcanbeanexcitingexperience.Sharing9☻☻请找出以下句子中的定语从句，先行词和关系词并分析关系词的作用Sharing10☻☻练习：语法填空1.Finallyhereachedalonelyisland________wascompletelycutofffromtheoutsideworld.2.Hefilledhiscontainersothathecouldbringsomebacktoanelder_____hadbeenhisteacher.3.Isitthreehoursthatittakestheboy________familyispoortocometoschoolonfoot?4.Noperiodinhistoryhashadasmanyimportantchanges____havetakenplaceinthepastcentury.Sharing11☻☻练习：请用定语从句翻译下列句子1.有一个美丽的小女孩，她的名字叫做小薇。2.自助者天助。3.众所周知，我们的生存环境已经遭到了严重地破坏。4.你可以做一个关于美国重要节日的讲座，这能帮助我们更多地了解美国文化。Sharing12☻☻☻拓展练习：改错3.Irealizedthatthevillagersgatheringaroundmewerearguingastowhoshouldhavethehonorofreceivingmeasaguestintheirhouse.1.Davidpointedtoapathwhichithethoughtwouldprobablyledtoavillage.2.Theweatherturnedouttobeverygood,thatwasmorethanwehadexpected.4.Thereasonthatherefusedthejobisunknown.Homework1.以表格的形式总结关系代词的用法.2.完成练习册period3并归纳关系代词选用的一些注意事项.