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1、情态动词;主要是mustI和mayI的否定回答——mustI…….No,youneedn’t/youdon’thaveto——mayI….No,youmustn’t宾语从句用一个句子做另一个句子的宾语,将这个句子叫做宾语从句。宾语从句做介词或及物动词的宾语。现在从下列三个方面总结归纳如下:一,引导词A,由that引导的陈述句性的宾语从句,在很多动词如say,think,wish,hope,see,believe,agree,expect,hear,feel等动词后。连词that只起连接作用,在从句中不做句子的成分,也无词汇意义,在口语中常被省略,但在大多数情况下还是以不省为好
2、,特别是在笔语中。例:Itoldhimthathewaswrong.l在think,believe,suppose,expect等动词引起的宾语从句中,有时谓语尽管是否定意义,却不用否定形式,而将think等动词变为否定形式。例:Idon’tthinkyouareright.(我认为你做的不对)l在许多带有复合宾语的句子中,that引导的宾语从句经常移到句子的后面,而用it做形式宾语。例:Wethinkitwrongthathetoldalietoeveryone(我认为他向每一个人撒谎是错误的)B,由连词if、whether引导的表示“是否…”的宾语从句。Whether,i
3、f在从句中不做句子的成分,一般情况下,whether和if可以替换。例:Idon’tknowif/whetherhewillcometomorrow.Theteacheraskedif/whetherwehadfinishedtheexperiment.l在介词后面的宾语从句中不用if引导例:Everythingdependsonwhetherwehaveenoughmoney。l宾语从句中有ornot时不用if引导.例:Idon’tknowwhetherthemoviestarwillcomeornot.l和不定式连用作宾语时不用if引导.例:Whethertogother
4、eornothasn’tbeendecided.C,由wh-引导的宾语从句。连接代词who,whom,whose,what,which,和连接副词when,where,why,how等连接的宾语从句,它们在句中即有连接从句的作用,又在句中充当句子的成分。例:Doyouknowwhichfilmtheyaretalkingabout?(which做定语)Idon’tknowwherehelives.(where做地点状语)二,宾语从句的语序,宾语从句从句的语序必须是陈述语序,既连接词+主语+谓语+其他成分例:Ibelievethattheywillcomesoon.Heaske
5、dmewhetherIwasateacher.Theywantedtoknowwhattheycandoforus.二,宾语从句的时态。宾语从句的时态受主句的限制,既:主句是一般现在时态,从句根据实际情况而定。主句是一般过去时态,从句用相应的过去的时态。如果从句的动作发生在主句之前,则从句要用过去完成时态。例:1)Shesaysthatsheisastudent.Shesaidthatshewasastudent.2)ShesaysthatshewillflytoJapaninaweek.ShesaidthatshewouldflytoJapaninaweek.3)Shesa
6、ysthatshehasfinishedherhomeworkalready.Shesaidthatshehadfinishedherhomeworkalready.4)ShesaysthatshecansingasonginEnglish.ShesaidthatshecouldsingasonginEnglish.l如果宾语从句说的是客观真理、自然现象或事实时,这时宾语从句要用一般现在时态。例:Theteachersaidthattheearthgoesroundthesun.HetoldmethatJapanisanislandcountry.lCouldyoutellm
7、e…是用来征询对方的意见,语气委婉,并不表示过去。例:CouldyoutellmewhenwewillvisittheHisturyMuseum?注意事项:u由陈述句变成宾语从句时,要注意人称的变化。例:Shesaid:“IhavebeentoEnglandbefore.”ShesaidthatshehadbeentoEnglandbefore.Sheaskedme:“Doyoulikemaths?”SheaskedmeifIlikedmaths.u宾语从句与简单句的交换。由连接代词和连接副词引导的宾语