初中英语语法大全之状语从句专项讲解

状语从句条件状语原因状语目的状语地点状语结果状语时间状语让步状语1、时间状语从句常用引导词:when,as,while,assoonas,while,before,after,since,till,until例句：Ididn'trealizehowspecialmymotherwasuntilIbecameanadult.WhileJohnwaswatchingTV,hiswifewascooking.连接词类别作用例句asas表示“当……的时候”，往往和when/while通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生ShecameupasIwascooking.（同时）Therunnersstartedasthegunwentoff.（几乎同时）when既可以表示在某一点的时候，又可表示在某一段时间内。when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用;when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生。Whenwewereatschool,wewenttothelibraryeveryday.（在一段时间内）Sorry，Iwasoutwhenyoucalledme．（call为短暂性动词）WhenIgottotheairport，theguestshadleft．（gotto后发生）whilewhile意思是“当……的时候”或“在某一段时间里”。从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用。主句中的动作或事情是在从句中的动作或事情的进展过程中发生，从句中的动词一般要用延续性动词。When／While／Asweweredancing，astrangercamein．（dance为延续性动词）Pleasedon’ttalksoloudwhileothersareworking.1.OneFriday,wewerepackingtoleaveforaweekendaway___mydaughterheardcriesforhelp.A.afterB.whileC.sinceD.when答案：D解析：句意为——星期五那天，当我们正准备出发去过周末的时候，我的女儿听到有人叫救。易混淆：在while和when这里犹豫。2.Ihadjuststeppedoutofthebathroomandwasbusilydryingmyselfwithatowel____Iheardthesteps.A.whileB.whenC.sinceD.after答案：B解析：下划线处表示“正在这时，突然……”，四个选项中只有when可以表示此含义。2、地点状语从句常用引导词:where例句Generally,airwillbeheavilypollutedwheretherearefactories.3、原因状语从句常用引导词:because,since,as,for例句MyfriendsdislikemebecauseI'mhandsomeandsuccessful.常用引导词:sothat例句Thebossaskedthesecretarytohurryupwiththeletterssothathecouldsignthem.4、目的状语从句常用引导词:so…that,such…that例句Hegotupsoearlythathecaughtthefirstbus.It'ssuchagoodchancethatwemustnotmissit.Tosuchandegreewasheexcitedthathecouldn'tsleeplastnight.5、结果状语从句6、条件状语从句常用引导词:if,unless例句We‘llstartourprojectifthepresidentagrees.7、让步状语从句常用引导词:though,although,evenif,eventhough例句Theoldmanalwaysenjoysswimmingeventhoughtheweatherisrough.1.Ihadbeenlookingforthebookfortwodays____Ifounditatlast.a.untilb.whenc.befored.while2.Hepunishedhisstudents____theydidanythingwrong.a.howeverb.wheneverc.whateverd.whichever3.Thosepassengerswillwaithere____thebusarrives.a.untilb.becausec.thoughd.as4.Hardlyhadwereachedhome____itbegantorain.a.beforeb.thanc.assoonasd.when5.Nosoonerhadwearrivedatthecinema___thefilmbegan.a.thanb.beforec.whend.assoonas6.Youcan’twatchTV____you’vefinishedyourhomework.a.sinceb.untilc.asd.after7.Wehadscarcelyleftourschool____therainbegan.a.beforeb.thanc.whiled.when8.Wehaveneverseenheragain_____shewenttoworkinanothercity.a.whenb.asc.sinced.whileSeeyou~