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单元语法专练语法精讲简单句和复合句之间的转换(二)1.用介词短语把状语从句转换为简单句。(1)由when,before,after等引导的时间状语从句,可以用相应的介词短语来代替。例如:We’llplayfootballwhenschoolisover.→We’llplayfootballafterschool.放学后我们要踢足球。Youmustwashyourhandsbeforeyouhavemeals.→Youmustwashyourhandsbeforemeals.吃饭前你必须洗手。(2)由if,unless引导的条件状语从句,可以用由without构成的介词短语来代替。例如:Peoplecan’tliveifthereisnoairorwater.→Peoplecan’tlivewithoutairorwater.没有空气和水,人类不能生存。语法精讲(3)由because引导的原因状语从句,可以用由becauseof构成的介词短语来代替。例如:Wedidn’tgotherebecauseitrainedheavily.→Wedidn’tgotherebecauseoftheheavyrain.由于下大雨,我们没有去那里。(4)由(as...)as引导的比较状语从句,有时可以用“beofthesame+名词”结构来代替。例如:LilyisasoldasLucy.→LilyandLucyareofthesameage.莉莉和露西年龄一样大。语法精讲2.用介词短语把宾语从句转换为简单句。某些动词后的宾语从句,可以转换为“介词+动名词(短语)”的形式。例如:Heinsistedthatheshouldgowithus.→Heinsistedongoingwithus.他坚持要和我们一起去。Thepoorboydoesn’tknowwhenandwherehewasborn.→Thepoorboydoesn’tknowthetimeandtheplaceofhisbirth.那个可怜的男孩不知道他出生的时间和地点。3.用介词短语把定语从句转换为简单句。如果定语从句中的谓语动词have表示“有”的含义,从句可转换成由with构成的介词短语作后置定语。例如:Heisamanwhohasalotofmoney.→Heisamanwithalotofmoney.他是个有钱人。语法精练Ⅰ.将下列复合句改为简单句1.Areyousurethattheyareinterestedinit?Areyousureabouttheirinterestinit?2.I’veremindedhimwhenwewillhavetheparty.I’veremindedhimof/aboutthetimeoftheparty.3.AtHalloweenyouwillseelotsofpeoplewhowearspecialcostumes.AtHalloweenyouwillseelotsofpeopleinspecialcostumes.4.Thepianistbegantolearntoplaythepianowhenhewasfouryearsold.Thepianistbegantolearntoplaythepianoat(theageof)four.5.Heworksevenharderthanbeforesothathecangotoagoodcollege.Heworksevenharderthanbeforeinorderto/soastogotoagoodcollege.语法精练Ⅱ.将下列简单句改为复合句1.Shecouldn’tgotobedearlybecauseoftoomuchhomework.Shecouldn’tgotobedearlybecauseshehadtoomuchhomework.2.Hecan’tworkouttheproblemwithouthelp.Hecan’tworkouttheproblemifhehasnohelp.3.Iwanttobuyahousewithabiggarden.Iwanttobuyahousewhichhasabiggarden.4.Doyouknowthegirlinaredskirtthere?Doyouknowthegirlwhoisinaredskirtthere?5.Shelearnttodanceattheageofsix.Shelearnttodancewhenshewassixyearsold.