Module4GrammarTimeadverbialclause时间状语从句课件高中英语选修七

GrammarReviewofadverbialclausesoftime1.when／while／as的用法:while/when/aswhile/when/asWhenWhileAs（随着）（一段时间，延续）（指时间点，非延续，不能用while）（一段时间，延续）（同时发生，对比）Point1:用法when从句谓语用延续性动词和非延续性动词均可，主、从句谓语表示的动作可同时或先后发生while从句谓语用延续性动词表示两个延续性动作同时发生且具有对比意味，常与进行时连用as强调主、从句动作同时发生表示“随着”之意①Hewasaboutto

leavewhensomeoneknockedatthedoor.______________________________________________②MarywasspeakingwhenTonybrokeinimpolitely!______________________________________________③We

hadjustfinished

thePartyontheschoolplaygroundwhenitbegantorainheavily.______________________________________________beabouttodo…

beonthepointofdoing...when…

bedoing…

had(just)done...他刚要走忽然有人敲门Mary在发言时Tony突然插话！2.before,since引导时间状语从句的用法:①Wemustleaveourdormitorybeforethedormitoryteachersclosethegateat7:15

在寝室老师在7点15分关门前，我们必须离开寝室。②Tonybrokeinbefore

Marycouldfinishherwords.

Mary还来不及说完Tony就插嘴了。③StudyEnglishhardbeforeitistoolate!

趁还不是太晚，努力学习英语吧。④Cathhasn’tphonedsinceshewenttoBerlin.

Cath自从去了柏林还没有打来过电话。Point2：

before的基本意思是“在…之前”但可灵活翻译为“还来不及…就…”，“趁…时”；since则表示“从…以后；自…以来”1.Pessimistically,itwillbealongtimebeforeChinamakesatradedealwithAmerica.2.Optimistically,itwon'tbealongtimebefore

ChinamakesatradedealwithAmerica.3.Itwasn'tlongbeforeheleftthecountry.4.ItwassometimebeforeIrealizedthetruth.5.Itis/hasbeen

manyyears

since

thetradeproblemarosebetweenChinaandAmerica.Itwillbe+段时间+before..要过...才...Itwon‘tbe+段时间+before…过不了..就..Itis/was+时间段+before…过了...才..Itis/wasnot+时间段+before…没过多久就...Itis/hasbeen+时间段+since…自从…有多久了Point3:引导时间状语从句的名词词组和个别介词短语常常有：themoment/second/minute/instant…eachtime,

everytime,

(the)nexttime,thefirst/second/…/lasttime,bythetime...⑤Hardly

hadMaryfinishedherwordswhen

Tonyaskedanotherquestion.Mary刚刚讲完Tony就问了另一个问题。⑥NosoonerhadTonyinvitedhertohaveaTVDebatethanMaryacceptedherchallenge.Tony一发出电视辩论的邀请，Maty就接受了挑战。Point4:表示“一…就…”的时间状语从句引导词

Assoonas…

Immediately/instantly/directly…

Themoment/minute/second/instant…

Hardly/scarcely…when/before…nosooner…than…Ontheirarrival/arriving,theybegantodebate.介词短On/upon+n/doing也可以做时间状语表示“一…就…，刚......就......”。5.其他时间状语从句常用引导词.①Since

Trumpbecamethepresident,thetariffshavebeenusedasweaponstoattacktheeconomiesofothercountries.②MaryalwayswaitedpolitelyuntilTonyfinishedherwords.Inotherwords,Marydidn’tbegintospeakuntilTonyfinished.③ItwasnotuntilTonyfinishedthatMarybegantospeak.④NotuntilTonyfinisheddidMarybegintospeak.⑤ItiscertainthatChinawillbemorepowerfulandprosperous

afterwedefeatAmericainthetradewar.

since(自从......)从句常常为过去式，主句为现在完成时

until/till…(一直到......)主句谓语动词常常为延续性

not…until(直到.......才......)主句谓语动词常常为非延续性after...(在......后）Practice:1.Youwillgrowwiser_________yougrowolder.2.Iwasabouttogotobed______________thetelephonerang.3.Ihaveheardalotofgoodthingsaboutyou_____________Icamebackfromabroad.4.It’smucheasiertomakefriends__________________youhavesimilarinterests.5.Hemetmanyproblems________________hewasgoingoverhislessons.as

when

since

whenwhilePractice:6.Johnthinksitwon’tbelong_______________heisreadyforhisnewjob7Asisreported,itis100years_____________QinghuaUniversitywasfounded.8.Timepassedquicklyandthewinterholidayshadgoneby___________weknewit.9._________________wemet,wewereataparty.第一次见面时，我们在参加一个聚会。beforesincebeforeThefirsttimePractice:10.IfoundmyselfinanentirelynewworldassoonasIarrivedinBeijing.①→Ifoundmyselfinanentirelynewworld__________________________IarrivedinBeijing.②→Ifoundmyselfinanentirelynewworld________________________IarrivedinBeijing.③→__________hadIarrivedinBeijing________