http://baike.baidu.com/view/238672.htm?fr=ala0复合句变简单句是英语句型转换的一种重要形式,也是我们运用英语所应掌握的技能.现对转换形式作一解题指导.规则一：将宾语从句变为简单句1.用不定式改写.将宾语从句中谓语动词变为不定式.主句谓语一般是既可接不定式,也可接that从句的动词,如hope,agree,decide等.若宾语从句由连接代（副）词引导时,要变为“疑问词＋不定式”.如：Weallagreedthatweshouldleaveatonce．→Weallagreedtoleaveatonce．TheforeignerswanttoknowhowtheycanlearntodoChineseKongfuwell.→TheforeignerswanttoknowhowtolearntodoChineseKongfuwell.2.用复合宾语,即"主语+谓语+宾语+宾补"这种结构语改写.如：Isawhewentintothathousejustnow．→Isawhimgointothathousejustnow．IheardshewassinginginEnglish．→IheardhersinginginEnglish．3.用名词或名词短语改写.如：DoyouunderstandwhatIsaid?→Doyouunderstandmywords?规则二：将状语从句变为简单句1.so．．．that引导的结果状语从句常与too．．．to或enoughto结构转换.当that从句为肯定句时,用enoughto改写；当that从句为否定句时,与too．．．to结构转换,与enoughto转换时,形容词或副词应变为与之相反的词,前面动词用否定结构.如：Theboxissolightthathecancarryit．→Theboxislightenoughforhimtocarry．Heissoyoungthathecan'tjointhearmy．→Heistooyoungtojointhearmy．→Heisn'toldenoughtojointhearmy．提示：so．．．that结构中如果主句与从句主语不一致时,变为too．．．to,enoughto结构时,须在不定式前加forsb．作为不定式的逻辑主语.2.if条件状语从句与“祈使句,and（or）+简单句.”的转换."if引导的否定的条件句+主句"的句型可转换为"祈使句+or+简单句"；"if引导的肯定的条件句+主句"的句型可转换为"祈使句+and+简单句".如：Bebrave,oryou'llloseyourchance.→Ifyouaren'tbrave,you'llloseyourchance.Useyourhead,andyou’llfindaway.→Ifyouuseyourhead,you’llfindaway..3.because引导的原因状语从句与becauseof的转换.如：Hewaslateforschoolbecauseitrainedheavily.→Hewaslateforschoolbecauseoftheheavyrain.4.把ifnot引导的条件状语从句转化为without短语.如：Ican’tpasstheexamifyoudon’thelpme.→Ican’tpasstheexamwithoutyourhelp.5.把时间状语从句转化为一个介词短语.如：IcouldswimwhenIwaseightyearsold.→Icouldswimattheageofeight.6.把sothat引导的目的状语从句转化为（inorder）todosth.如：Shegotupearlysothatshecouldcatchtheearlybus.→Shegotupearlytocatchtheearlybus.规则三：将定语从句变为简单句1.当定语从句是主动语态并且用的是进行时态时,可将定语从句改为现在分词短语；当定语从句中的谓语动词是表示经常性的动作时,可将定语从句改为现在分词短语.如：ThemanwhoistalkingwithMaryismybrother.→ThemantalkingwithMaryismybrother.Achemist’sshopisashopwhichsellsmedicine.→Achemist’sshopisashopsellingmedicine.2.当定语从句是被动语态时,可将定语从句改为过去分词短语；当定语从句是表示将要发生的动作或具体某种情态意义时,可将定语从句变为不定式短语.如：Thisisabookwhichwaswrittenbyaworker.→Thisisabookwrittenbyaworker.Thereisalotofhomeworkthatweshoulddo.→Thereisalotofhomeworkforustodo.3.当定语从句中含有介词短语或形容词短语做表语时,可将定语从句改为介词短语.如：ThegirlwhoisinahatisLucyKing.→ThegirlinahatisLucyKing.