状语从句 时间+ 原因.ppt

Unit4 Grammar Entertainment 一 Adverbialclauseoftime when while as after before since until till every eachtime whenever 1 before atanearliertimethan 2 after atalatertimethan 3 whileandas atthesametimeaswhileisusuallyusedwithlongeractionsandaswithshorteractions 4 Since fromthetimethat 5 until uptothetimethatwhenspeaking wecanusetillinsteadofuntil when 当 时侯 就在这时Shewasdoingherhomeworkwhenshehadagoodidea when while as的区别 while 当 时侯 从句的谓语必须是持续性动词 与主句谓语同时进行且用进行时态 或从句用 be 表语 表示状态 趁 之时 然而 并列句 尽管 as 当 时 在 的同时 一边 一边 随着 Astimewentby herealizedhismistake 1 hecomesheretomorrow Iwillcallyou atthetimethat 2 Henryisinchargeoftheoffice Mr Smithisaway duringthetimethat HelearnedtospeakEnglish hewashere 4 Iliketea shelikescoffee 5 theywerepickingtea thegirlsweresinginghappily 6 Shesang sheworked When while while while As as Exercises before 1 IhadenteredtheclassroombeforeIheardthebell 2 You dbetterwriteitdownbeforeyouforgetit 3 Lookbeforeyouleap 三思而后行 4 ItwillbehalfayearbeforeIcomehereagain 5 Itwaslessthanonemonthbeforetheygottheresult 注意英汉的差别 1 在 之前 才 2 还没来得及 就 3 没过多长时间就 4 趁还没 5 一 就 等 it be time before句型归纳1 Itwasnotlongbeforeshelearnedthosepoemsbyheart 2 Itwaslongbeforethepolicearrived 3 Itwillbehoursbeforehemakesadecision 4 Itwillnotbehoursbeforewemeetagain 用不了多久又一条新的遂道就要建成穿过浦江 Itwon tbelongbeforeanewtunnelisbuiltacrosstheHuangPuRiver 过了好多年他才知道谁在他困难时帮助了他 Itwasmanyyearsbeforeheknewwhohadhelpedhimwhenhewasintrouble Since的用法eg Itisfiveyearssinceshecamebacktosettledownfromabroad eg ItisthreeyearssinceIbegantosmoke eg ItisthreeyearssinceIsmokedacigarette eg Itisfouryearssincehelivedhere 注意 这个句型的时间要从since从句中作谓语的动作或状态结束后算起 如果since从句的谓语是持续性或反复性动词时 要按否定来理解 Itis hasbeen 时间段 since 自从 以来已有多长时间了 themoment theminute thesecond theinstant 结合报纸 1 Theenginestartedtheminutethebuttonwaspressed 2 Thelampwilllightthemomentyoupressthebutton 3 IknewIhadmadeamistaketheinstantIhaddoneit 一 就 assoonas assoonas nosooner than hardly when scarcely when 注意 nosooner than hardly when scarcely when中否定词放句首时主句要部分倒装 并且用过去完成时态 一 就 1 Hardly ScarcelyhadIgothomewhenitbegantorain 2 NosoonerhadIgothomethanitbegantorain Until till 用于肯定句 句子的谓语动词必须是延续性动词 如 Itwaslargelyforgottenuntilitwasdiscoveredagainin1858 IstudiedEnglishuntil9o clocklastnight Continueinthisdirectionuntilyouseeasign 注意 until可以位于句首 till则不能 Untilyoutoldme Ihadnoideaofit Iwillwaitforyoutill untilyoucomeback 2 not until 直到 才 Ididn tgotosleepuntil11o clock Hedidn tleavetheofficeuntilhefinishedthework Thelittleboydidn tstopcryinguntilhesawhismother till until引导的时间状语从句 如果主句中的动词为瞬间动词 主句必须用否定形式 Notuntil在句首 主句用倒装 如 Ididn tgotosleepuntil11o clock Notuntil11o clockdidIgotosleep Hedidn tleavetheofficeuntilhefinishedthework Notuntilhefinishedtheworkdidheleavetheoffice Thelittleboydidn tstopcryinguntilhesawhismother Notuntilhesawhismotherdidthelittleboystopcrying Youwillnotunderstandthebeautyuntilyouseeitwithyourowneyes Notuntilyouseeitwithyourowneyeswillyouunderstandthebeauty Itis wasnotuntil that 为强调结构Hedidn tleavetheofficeuntilhefinishedthework Itwasnotuntilhefinishedtheworkthathelefttheoffice Ididn tgotosleepuntil11o clock Itwasnotuntil11o clockthatIwenttosleep Youwillnotunderstandthebeautyuntilyouseeitwithyourowneyes Itisnotuntilyouseeitwithyourowneyesthatyouwillunderstandthebeauty 他直到病了才意识到健康的重要性 1 Hedidn trealizetheimportanceofhealthuntilhewasill 2 Notuntilhewasilldidherealizetheimportanceofhealth 3 Itwasnotuntilhewasillthatherealizedtheimportanceofhealth 二 AdverbialClausesofReasonbecause since as nowthat for 1 because语势最强 用来说明人所不知的原因 回答why提出的问题 当原因是显而易见的或已为人们所知 就用as或since 1 Ididn tgobecauseIwasafraid 2 Since Astheweatherissobad wehavetodelayourjourney 2 由because引导的从句如果放在句末 且前面有逗号 则可以用for来代替 但如果不是说明直接原因 而是多种情况加以推断 就只能用for 1 Heisabsenttoday because forheisill 2 Hemustbeill forheisabsenttoday because since as和for 其他类的状语从句和连接词 地