精选幻灯片-状语从句

状语从句复习,1,2008年考试说明中提出的考试目标：,状语从句,b级：对知识的领会、理解和转换。,c级：对知识的运用、分析和重组。,2,状语从句的种类,时间状语从句:MyfathercamebackwhenIwaswatchingTV.条件状语从句Ifitdoesntraintomorrow,Iwillgowithyou.原因状语从句MrZhangcantcomeherebecausehesverybusy.比较状语从句Imtallerthanyou.目的状语从句XiaoMingworkshardsothathecangetgoodgrades.结果状语从句TheboxissoheavythatIcantcarryit.让步状语从句Althoughheisoldnow,hestillreadsbookseveryday.,3,引导时间状语从句的连词有：when（当时）while（当的时候，而）as（当，随着）before（在以前）after（在以后）since（自从）till/until(直到才)assoonas(一就),时间状语从句,时间状语从句在复合句中作状语，表示主语动作发生的时间,4,when，while和as都可表示“当时候”,但用法有区别:when意为“在时；当时”,从句和主句的动作可以同时发生，也可以先后发生例如:WhenIgothome,hewashavingsupper.as与while则强调从句和主局的动作同时发生.从句的谓语常用进行时态,表示“随着,正当”,“一边一边”的意义。Theysangastheydanced.WhileIwassleeping,myfathercamein.注：从句谓语是持续性动词时，when、while和as可以互换，主、从句谓语都是终止性动词时，when与as可互换，从句谓语表示状态时,通常用while。,5,since引导的时间状语从句，注意主句一般要用现在完成时，而since引导的时间状语从句用一般过去时。例如:HehasworkedinthisschoolfortenyearssincehecametoHangzhou.,注：it作主语时，常用一般现在时或现在完成时。例如：ItistenyearssinceIcametothisschool.或IthasbeentenyearssinceIcametothisschool.,6,until和till引导的时间状语从句。当主句的谓语动词是stay,wait,work等延续性动词时，主句用肯定形式，表示动作的结束。例如：Iwillwaitforyouuntil/tillyoucomeback.但如果是go,see等短暂性动词时，主句必须为否定形式，表示主句动作的开始.例如：Ididntgotobeduntilitwaselevenoclock.,7,条件状语从句,条件状语从句在复合句中作状语，表示主语动作发生的条件、假设等,引导条件状语从句的连词有：if（如果）unless（除非）=ifnot,8,条件状语从句中主句是一般将来时，从句用一般现在时代替将来。,例如:IwillgoshoppingwithyouifIamfreeonSunday.Youwillmisstheplaneunlessyouhurryup.=Youwillmisstheplaneifyoudonthurryup.,9,原因状语从句,引导原因状语从句的连词有：because（因为）since（由于，既然）as（由于）,10,because往往指对方不知道的原因，多用语回答why提出的问题。,例如:Mr.Zhangcantcomeherebecausehesverybusy.,as或since一般用于说话双方都明了的原因或做某事的理由。,例如:a)Sinceyouareill,youdbetterstayathome.b)Astheproblemisveryimportant,welltalkaboutitagain.,11,注：because和as不能与so连用。如：Becauseheisill,hecantcometoschool.或Heisill,sohecantcometoschool.,12,比较状语从句,引导比较状语从句的连词有：than（比）asas（和一样）notas/soas（不如）morethan（多于）lessthan（少于）the+比较级；the+比较级（越越）,13,比较级+than(比更)，as+原级+as(与一样)，notso(as)+原级+as(不如)等连接的比较状语从句，用于在主句之后，从句中常省略一些和主句中相同的成分。例如:TomistallerthanMike.Thissongismuchmorepopularthanthatone.Thisclassroomisntasbigasthatone.,14,the+比较级,the+比较级(越就越)连接的比较状语从句通常在主句之前。例如:Themore,thebetter.,15,目的状语从句,目的状语从句在复合句中作状语，表示主句的动作发生的目的,由sothat连词引导。“以便”表示目的的状语从句常用情态动词may,might,can,could,will,would或should.例如：XiaoMingworkshardsothathecancatchupwithhisclassmate.,16,Sothat有时也可以引导结果状语从句，意思为“以致，因而”，从句中不用情态动词。例如：theymissedthebussothattheywerelateforclass.,17,结果状语从句,引导结果状语从句的连词有：suchthatsothat（如此以至于）sothat注：such后跟名词so后跟形容词或副词,例如：Theboxissoheavythattheboycantcarryit.Sheissuchakindgirlthateveryonelikesher.,18,让步状语从句,引导让步状语从句的连词有：thoughalthough(虽然，尽管)evenif（即使）howevernotmatterhow(无论怎么)wheneverWherever,19,though,although引导的让步状语从句，主句中不能用连词but.例如：Although/Thoughitwasverycold,wegotupearlyasusual.由however,notmatterhow引导的让步状语从句，其后须紧跟形容词或副词例如：Nomatterhowharditrained,hedidntstopwalkinginthestreet.,20,造句,when（当时）since（自从）till/until(直到才)ifbecausesothat（如此以至于）sothatalthough(虽然，尽管)notmatterhow,21,1Themeetingdidntstart_everyonewasthereA.becauseB.untilC.whyD.if2Theboy_tobed_hismothercamein.wentnot;untilB.didntgo;afterC.went;untilD.didntgo;until3.Iwontbelieveyou_Ihaveseenitwithmyowneyes.A.beforeB.untilC.afterD.when4.He_home_shewassatisfied_hisansweryesterday.didntgo;until;withB.wasntgo;after;toC.doesntgo;before;withD.didntgo;until;to,Exercises,22,1.Illletyouknow_hecomesback.A.beforeB.becauseC.assoonasD.although2.Shewillsingasong_sheisasked.A.ifB.unlessC.forD.since3.Wewillwork_weareneeded.A.wheneverB.becauseC.sinceD.wherever4.Readitaloud_theclasscanhearyou.A.sothatB.ifC.whenD.although5._yougo,dontforgetyourpeople.A.WheneverB.HoweverC.WhereverD.Whichever,23,1.Bringitnearer_Imayseeitbetter.A.althoughB.eventhoughC.sothatD.since,2.Wedbetterhurry_itisgettingdark.A.andB.butC.asD.unless,3.Thehist