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1、外研版高中英语状语从句的省略，时态及倒装讲与练I.状语从句的省略一．1.When(wateris)pure，waterisacolorlessliquid.2.When(Iam)introubleIalwaysturntoherforhelp.3.Errors，ifany，shouldbecorrected.(if后省略了thereare)4.Woodgivesmuchsmokewhile(woodis)burning.5.Theletteristobelefthereuntil(itis)call
2、edfor.6.Henrylookedaboutasif(hewere)insearchofsomething.7.Shestudiesveryhardthough(sheis)stillratherweak.总结：主句的主语与从句的主语一致时，且从句谓语含有be动词时可用省略。形式为：连词+名词、形容词、介词短语、分词、不定式。二。“when(或if，where，wherever，whenever，assoonas，，than等)+possible/necessary等”时，可理解中间省略了iti
3、s(或was)。1.Answerthesequestions，if(itis)possiblewithoutreferringtothebook.2.When(itis)necessaryyoucanhelpustodosomething.1.时间状语从句中的省略When(shewas)veryyoung,shebegantolearntoplaythepiano.While(Iwas)atcollege,Ibegantoknowhim,astrangebutablestudent.Whenarri
4、ving,sendmeatelegram.(Whenyouarrive,sendmeatelegram.)Beforeleaving,turnoffallthelights.(Beforeyouleave,turnoffallthelights.)Don’tcomeinuntil(youare)askedto.Whenever(itis)possible,youshouldcomeandhelp.Youshouldletusknowtheresultassoonas(itis)possible.注：
5、as在引导时间状语从句时，没有这种省略现象。我们不可说Aswalking,shefoundaniceshiningthingontheground.2.条件状语从句中的省略常用的句型是：ifnecessary,ifpossible,iftrue,ifanyone等。如：Sendthegoodsnowif(theyare)ready.Hewillcomeif(heis)asked.If(itis)necessary,ringmeathome.Comealongwithmeif(itis)possibl
6、e.。If(itis)true,thiswillcauseusalotoftrouble.Therearefewpeoplenowadays,if(thereare)any,whorememberhim.Youshouldstaywhereyouare,unless(youare)askedtoleave.3.让步状语从句中的省略Heisagoodman,thoughsometimes(heis)ratherdull.Evenif(Iam)invitedto,Iwon’tgotosuchabadle
7、cture.4.比较状语从句中的省略Shecanplaythepianojustaswonderfullyasyou(do).Shehasfinishedtheworkearlierthan(ithasbeen)expected.5、方式状语从句中的省略asif/asthough后还可加n./a./ad./介词短语／现在分词／过去分词／不定式。Heactsasif(hewere)afool.Shetalkedtothestrangerasif(shewere)absent-minded.Heopen
8、edthedesk,asif(hewas)insearchofsomethingimportant.Theboyisrunningimpatientlyhereandthereasif(heis)searchingforsomethinglostonthesportsground.Thefootballplayerisrollingonthegroundasif(heis)hurtbadlyintheleg.Hemovedhislipsasif(hewanted)to
