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状语从句状语从句状语从句考点1、各种从属连词的含义及用法比较；2、nomatterwh-与wh-ever引导的从句的区别；3、状语从句的时态问题；4、状语从句的倒装问题；5、状语从句与其它从句的区别。1、时间状语从句问题1：Don’tbeafraidofaskingforhelp____itisneeded.（03全国卷）A．unlessB．sinceC．althoughD．whenD复习when时要注意比较它与while与as的区别。when,while,as三者的具体用法关键在于动作发生的时间及从句的动词。while表时间，从句需用延续性动词，不用瞬间动词；when表时间，从句既可用延续性动词，又可以用瞬间动词；as表时间，与when相似，但侧重强调主、从句动作同点或同段进行，可用延续行动词的一般过去式表式过去进行时。(一边…一边;随着…)when,while后还可以接分词短语。when作并列连词，表示一个动作在发生时，另一个动作接着发生，这时就不能用while、as。Iwaswalkingonthestreetwhensuddenlysomeonepattedmeontheshoulder.while作并列连词，表示两种情况对比。HewasplayingtheguitarwhilehissisterwaswatchingTV.问题2：1)—Washisfatherverystrictwithhimwhenhewasatschool?—Yes.Hehadneverpraisedhimhebecameoneofthetopstudentsinhisgrade.（03北京春季）A．afterB．unlessC．untilD．When2)Simonthoughthiscomputerwasbroken________hislittlebrotherpointedoutthathehadforgottentoturniton.（05北京春季）A.untilB.unlessC.afterD.becauseCAuntil/till“直到……止”(肯定句，主句是延续性动词);not…until“直到……才”(否定句，主句是终止性动词);until可用于倒装句和强调句，till不用于句首。NotuntilIreturneddidshefinishherhomework.ItwasnotuntilIreturnedhomethatshefinishedherhomework.问题3：1、TheAmericanCivilWarlastedfouryears______theNorthwonintheend.(05广东卷)A.afterB.beforeC.whenD.then2、Hemadeamistake,butthenhecorrectedthesituation______itgotworse.（03北京）A.untilB.whenC.beforeD.asBCbefore从句是高考中的一大热点，从时间概念上不难作出判断。before与高考Someonecalledmeupinthemiddleofthenight,buttheyhungup____Icouldanswerthephone.A.beforeB.sinceC.untilDasA1.表示”在…之前”.这时主句和从句两个动作按时间先后依次发生．Wheredidyoustudybeforeyoujoinedthearmy?2.表示“．．．才”强调从句的动作发生得晚或慢．Hehadwalkedforawholedaybeforehefoundwater.3.表示“还没来得及…就”强调在从句动作发生之前,主句动作已发生.HefellasleepbeforeIcouldtakeoffhisclothes.注意：这时before本身含有否定意义，从句不能再用否定句．Thestudentsrushedoutoftheclassroombeforethebellrang.翻译：铃还没响，学生们就冲出了教室．5.表示“不知不觉地…就”常用于句型beforeoneknewit.TimepassedquicklyandthreemonthswentbybeforeAqiaoknewit..4.表示“趁着没…”“以免”Wewanttobuysomethingnowbeforepricesgoup.6.用在“Itwas/willbe(not)+一段时间＋before从句”中，译作“才”“就”(1)ItwasnotlongbeforeheleftfortheUnitedStates.(2)Itwasthreeweeksbeforetheyarrivedatthemountainvillage.(3)Itwillbefouryearsbeforewemeetagain.时间状语从句的连词1.once,assoonas(immediately,directly,instantly,theminute/moment/instant)hardly/scarcely…when,nosooner…than2.every/eachtime,nexttime,thefirst/second/lasttime…bythetime…3.When/whenever#WhenIcamein,somestudentsweresleeping.Wheneveryouareintrouble,I`llhelpyou.1._____________Imethim,hewasdressedverywell.2.WesawanEnglishfilm________________lastnight.3.Thisis___________thatwehaveseenthefamousstar.ThefirsttimeforthefirsttimethefirsttimeSince(conj./prep./adv.)1.Ihaven`theardfromhimsinceIleftschool.2.Wehavelivedheresince2003/tenyearsago.3.Theyhaveneverseeniteversince.It+be+sometime+since-clause这个句型表示从since从句谓语动作发生以后到现在或过去所经过的一段时间，意为“自从......以来已多久了”...