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1四十个重点句型总结句型1wouldratherthatsb.did…宁愿……;更愿意……(表示现在或将来的愿望)wouldratherthatsb.haddone…宁愿……;更愿意……(表示过去的愿望)eg:I'dratheryoupostedtheletterrightnow.我想让你现在去寄信。I'dratherthatIhadn'tseenheryesterday.我情愿昨天没有看到她。句型2asif/though+主语+did/haddone…好像……(表示现在或将来的情况用过去时;表示过去的情况用过去完成时)eg:AlantalkedaboutRomeasifhehadbeenthere.Alan谈起罗马来就好像他去过那里似的。句型3wish+宾语从句，表示不大可能实现的愿望表示现在的愿望：主语+过去时;表示过去的愿望：主语+haddone;表示将来的愿望：主语+would/coulddoeg:HowIwishwestudentshadmorefreetimetorelaxourselves!我们学生多么希望有更多的自由时间放松自己!句型4It'shigh/abouttimethatsb.did(shoulddo)(should通常不省略)…早就该……eg:It'shightimethatwedidsomethingtoimproveourenvironment.该是我们为环保做些事情了。句型5情态动词+动词不定式完成结构的用法couldhavedone本来可以……(表示过去没有实现的可能)。mighthavedone本来可能……;本来应该或可以做某事(实际没有发生;含有轻微的责备语气。should/oughttohavedone本来该做某事(而实际未做)shouldnot/oughtnottohavedone本来不该做(实际却做过了，含有责备语气)needn'thavedone本来不必做(但是已经做过了)wouldratherhavedone当时宁愿做了某事(实际没有做过);否定式wouldrathernothavedone表达相反意思，两者都有表示后悔之意。句型6as,though,although引导的让步状语从句。[注意]although位于句首;though位于句首或句中;as位于句中=though。它的词序是把句中强调的形容词、副词、动词或名词放在连词前。eg:Although/ThoughIrespecthimverymuch,Icannotagreewithhisidea.=Muchas/thoughIrespecthim,Icannotagreewithhisidea.虽然我很尊重他，但是我不同意他的观点。eg:Although/Thoughheisachild,heknowsalotofChinesecharacters.=Child(省略冠词)as/thoughheis,heknowsalotofChinesecharacters.他虽然还是个孩子，却认识了许多汉字。eg:Althoughitisraining,I'mgoingoutforawalk.2=Rainingasitis,I'mgoingoutforawalk.天虽然在下雨，我还是要出去散步。eg:MuchasIwouldliketohelp,Ihavealottodo.虽然我很想帮助你，但是我有很多事要做。eg:Objectasyoumay,Iwillgo.纵使你反对，我也要去。句型7…before…特殊用法(1)没来得及……就……eg:Therooffellbeforehehadtimetodashintotheroomtosavehisbaby.他还没有来得及冲进房间救孩子，房顶就塌了。eg:HeranoffbeforeIcouldstophim.我还没有来得及阻止，他已经跑了。句型8…before…特殊用法(2)过了多久才……或动作进行到什么程度才……eg:Theywalkedaboutfiftymilestothewestbeforetheysawavillage.他们西行50英里才看到一个村庄。eg:Healmostknockedmedownbeforeheknewit.他几乎撞到我了才意识到。eg:FiveyearswentbybeforeIknewit.不知不觉，五年过去了。句型9Itwas+时间段+before….过了多久才(怎么样)……Itwasnotlongbefore….不久，就……Itwill(not)be+时间段+before….要过多久(不久)……才……(before从句谓语动词要用一般时态)eg:Itwasnotlongbeforehesensedthedangeroftheposition.不久他就意识到他处境的危险。eg:Itwasfivedaysbeforehecameback.五天后他才回来。句型10incaseof…(+n.)以防;万一;incasethat…以防，万一……(谓语动词用一般现在时态或should+动词原形)eg:Incaseoffire,whatshouldwedo?万一失火了，我该怎么办？eg:Pleasetakeyourumbrellaincase(thatitrains/shouldrain).带上雨伞，以防下雨。句型11It强调句型强调句的基本构成：Itis/was+被强调的部分+who(主要指人时)/that+其余部分这种结构可以强调句子的主语、宾语、状语(包括时间，地点，方式，原因等)，但是不能强调谓语动词原句的谓语动词如果是现在或将来时态，用Itis…that/who….;原句的谓语动词如果是过去时态，用Itwas…that/who….;强调时间、地点、原因或方式时不要用when,where或how,必须用that。eg:Isawhiminthestreetyesterdayafternoon.→ItwasIwhosawhiminthestreetyesterdayafternoon.(强调主语)→ItwasinthestreetthatIsawhimyesterdayafternoon.(强调地点状语)→ItwasyesterdayafternoonthatIsawhiminthestreet.(强调时间状语)→Itwashimthat/whoIsawinthestreetyesterdayafternoon.(强调宾语)eg:Onlywhenyounearlylosesomeonedoyoufullyrealizehowmuchyouvaluehim.→Itisonlywhenyounearlylosesomeonethatyoufullyrealizehowmuchyouvaluehim.只有你快要失去某个人时，你才意识到你是多么尊重他。eg:Iwaslateagainbecausethetrafficwasveryheavyduringtherushhour.3→ItwasbecausethetrafficwasveryheavyduringtherushhourthatIwaslateagain.(强调句中只能强调由because引导的原因状语从句，because不能换成since,as,for,nowthat)强调句的疑问结构一般疑问句Is/Wasit+被强调部分+who/that…?特殊疑问句特殊疑问词+is/was+it+who/that…?Whatis/wasitthat…?Whois/wasitthat…?Whenis/wasitthat…?Whereis/wasitthat…?Whyis/wasitthat…?Howis/wasitthat…?eg:Isawhiminthestreetyesterdayafternoon.→Whenwasitthatyousawhiminthestreet?→Whowasitthatyousawinthestreetyesterdayafternoon?→Wherewasitthatyousawhimyesterdayafternoon?eg:Idon'tknowwhenhewillcomeback.→Idon'tknowwhenitisthathewillcomeback.(宾语从句疑问词后用陈述句语序)句型12(1)、祈使句(表条件)+or/orelse/otherwise+主句(表结果)…否则…，要不然…(2)、祈使句(表条件)+and+主句(表结果)eg:Pleasecallmeupbeforeyoucome,otherwise/orelse/orwemightbeout.你来之前打个电话，否则，我们也许会出去。eg:Givehimaninchandhewilltakeamile.得寸进尺。eg:Workhardandyouwillmakeprogresseveryday.好好学习，天天向上。句型13…until….直到……时候;not…until…直到……才……eg:Youaretostayuntil/tillyourmothercomesback.你得等到你妈妈回来。eg:Themeetingwasputoffuntilteno'clock.会议推迟到十点钟。eg:Thevillagersdidn'trealizehowseriousthepollutionwasuntilallthefishdiedintheriver.等到湖里的鱼全死光了，村民们才意识到污染是多么严重。句型14unless…除非，如果不……(=if…not)eg:Ishallgotomorrowunlessitrains.如果不下雨，我明天去。eg:Iwon'tgounlesshecomestoinvitemehimself.除非他本人来邀请我，不然我是不会去的。句型15when引导的从句when除了用来引导主语从句、宾语从句、时间状语从句、表语从句和定语从句，还有一种用法值得关注，那就是when引导并列分句，意思是这时突然;就在那时，强调另一个动作的突然发生。常用于以下句型中：(1)、主语+bedoing…when…意思是正在做某事这时……;(2)、主语+beabouttodo…when…;(3)、主语+beonthepointof(doing)…when…意思是正要去做某事这时……eg:OnedayChuckwasonaflightacrossthePacificOceanwhensuddenlyhisplanecrashed.有一天，Chuck正在太平洋上飞行，这时他的飞机突然爆炸了。eg:Idon'tknowwhenhewillarrive.我不晓得他什么时候到达。eg:IthoughtofthehappydayswhenIwasinBeijing.我想起了在北京时的那段快乐日子。4eg:Iwasabouttoleavewhenitbegantorain.我刚要离开，这时下雨了。[比较]eg:IwaswalkingalongthestreetwhenIcaughtsightofatailor'sshop.我正在街上走，这时我看见一家裁缝店。eg:Iwaswalkingalongthestreets.JustatthemomentIcaughtsightofatailor'sshop.我在街上走。就在那时我看见一家裁缝店。句型16while引导的从句while除了有当/在……时候的意思外(注意：引导的句子谓语动词只能是延续性动词!)，另外的两层意思也是考查的重点：(1)while=although尽管、虽然，引导让步状语从句;(2)while的意思是然而;可是，常用来表达对比关系。eg:WhileIadmithisgoodpoints,Icanseehisshortcomings.虽然我承认他的优点，我也能看出他的缺点。eg:WhileIwasangrywithher,Ididn'tlosemytem