宾语从句的用法归纳.ppt
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1、一、宾语从句根据引导词的不同可分为三种类型:1.由that引导的宾语从句。如:We knew(that)we should learn from each other.2.由if/whether引导的宾语从句。如:Please tell me if/whether you have been to America.3.由who,where,how等连接代词或连接副词引导的宾语从句。如:Can you tell me how I can get to the nearest post office?二、宾语从句引导词、语序与时态二、宾语从句引导词、语序与时态1.1.引导词引导词 假如从句是陈述句
2、,引导词用假如从句是陈述句,引导词用that(thatthat(that在口语或非正式文体在口语或非正式文体中常省略中常省略);假如从句是一般疑问句,引导词用;假如从句是一般疑问句,引导词用if/whetherif/whether;假如;假如从句是非凡疑问句,引导词用由疑问词转换而来的疑问代词从句是非凡疑问句,引导词用由疑问词转换而来的疑问代词/副词。副词。2.2.语序语序 陈述句变为宾语从句,语序不变,即仍用陈述语序。如:陈述句变为宾语从句,语序不变,即仍用陈述语序。如:He is an honest boy.The teacher said.The teacher He is an hon
3、est boy.The teacher said.The teacher said(that)he was an honest boy.said(that)he was an honest boy.一般疑问句和非凡疑问句(特殊疑问句)变为宾语从句,语一般疑问句和非凡疑问句(特殊疑问句)变为宾语从句,语序变为陈述语序。如:序变为陈述语序。如:Does he work hard?I wonder.I wonder if/whether he Does he work hard?I wonder.I wonder if/whether he works hard.works hard.When di
4、d he leave?I dont know.I dont know when When did he leave?I dont know.I dont know when he left.he left.3.时态时态 假如主句是现在的时态,从句的时态可根据假如主句是现在的时态,从句的时态可根据实际情况而定。如:实际情况而定。如:I have heard(that)he will come back next week.假如主句是过去的某种时态,那么从句的时假如主句是过去的某种时态,那么从句的时态一定要用过去的某种时态。如:态一定要用过去的某种时态。如:He said(that)there w
5、ere no classes yesterday.注重:假如宾语从句表述的是客观注重:假如宾语从句表述的是客观真理、自然现象等时,不管主句是什么时态,从句真理、自然现象等时,不管主句是什么时态,从句都要用一般现在时。如:都要用一般现在时。如:He said that light travels much faster than sound.三、人称的变化和标点的使用三、人称的变化和标点的使用 1.从句的主语假如是第一人称,变为宾从句的主语假如是第一人称,变为宾语从句则与主句的主语一致;假如是第二人语从句则与主句的主语一致;假如是第二人称,则与主句的宾语一致;假如是第三人称,称,则与主句的宾语一
6、致;假如是第三人称,不用变化。如:不用变化。如:“May I use your knife?”He asked me.He asked me if he might use my knife.“Do you know her telephone number?”He asked me.He asked me if I know her telephone number.2.宾语从句的标点均由主句决定。宾语从句的标点均由主句决定。主句是陈述句,用句号;主句是疑问主句是陈述句,用句号;主句是疑问句,用问号。如:句,用问号。如:Who will give us a talk?I dont know.
7、I dont know who will give us a talk.Do you know?Where does he live?Do you know where he lives?四、四、if和和when既能引导时间状语从句,既能引导时间状语从句,又能引导宾语从句。又能引导宾语从句。if和和和和when既能引导时间状语从句,又既能引导时间状语从句,又能引导宾语从句。因此,碰到它们就要认能引导宾语从句。因此,碰到它们就要认真分析一下,它们究竟属于真分析一下,它们究竟属于“两副面孔两副面孔”的哪一副。如:的哪一副。如:If it rains tomorrow,I wont come.(时间
8、状时间状语从句语从句)I dont know if it will rain tomorrow.(宾语从句宾语从句)五、从句的简化五、从句的简化 1.当主句谓语动词是当主句谓语动词是find,see,watch,hear等感官动词时,从句常简化为等感官动词时,从句常简化为“宾语宾补宾语宾补”结构,宾补为不带结构,宾补为不带to的不定式或的不定式或V-ing形式。如:形式。如:She found that the wallet lay/was lying on the ground.She found the wallet lie/lying on the ground.2.当主句谓语动词是当主
9、句谓语动词是hope,wish,decide,forget,plan,agree等,且主句主语与从句主等,且主句主语与从句主语相同时,从句可简化为不定式结构。如:语相同时,从句可简化为不定式结构。如:She agreed that she could help me with my maths.She agreed to help me with my maths.3.在连接代词在连接代词/副词引导的宾语从句中,当从句主语与主句主语副词引导的宾语从句中,当从句主语与主句主语或间接宾语一致时,宾语从句可简化为或间接宾语一致时,宾语从句可简化为“连接代词连接代词/副词不定副词不定式式”结构。如:结
10、构。如:Can you tell me how I can get to the station?Can you tell me how to get to the station?六、宾语从句的用法顺口溜:六、宾语从句的用法顺口溜:宾语从句三姊妹,宾语从句三姊妹,that,if/whether,wh-/how展风采。展风采。展风采有三关,引导词、语序、时态在把关。展风采有三关,引导词、语序、时态在把关。主从时态要一致,陈述语序永不变。主从时态要一致,陈述语序永不变。陈述请你选陈述请你选that,疑问需用,疑问需用if/whether连。连。非凡问句(特殊疑问句)作宾从,原来问词不用换。非凡问
11、句(特殊疑问句)作宾从,原来问词不用换。三关过后莫自得,人称、标点需注重。三关过后莫自得,人称、标点需注重。留意变脸的留意变脸的if/when,从句的简化记心间。,从句的简化记心间。宾语从句习题基础练习宾语从句习题基础练习1.Have you decided _for Australia?A.when will you leave B.when do you leaveC.when you will leave2.Can you tell me _?A.where does Tom live B.where Tom livedC.where Tom lives3.The old man ask
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