牛津译林版英语八年级上册 Unit 8 Natural disasters语法讲练

Unit8语法知识复习一、过去进行时态一）、含义：①过去某个时间正在发生的动作例：Hewascookingatsixlastnight.昨天晚上六点，他正在做饭。②过去某段时间正在发生的动作例:IwasstayingherefromMarchtoMaylastyear.去年从3月到5月,我一直呆在这里。二）、标志词atninelastnight/atthattime=then/atthistimeyesterday/或有whentheteachercamein/whilehewasreading的提示三）、构成 过去进行时的构成：was'were+现在分词四）、运用1、过去进行时的四个基本句型肯定句Hewascookingatsixlastnight.否定句Hewasnotcookingatsixlastnight.~^般疑问句 Washecookingatsixlastnight?回答Yes,hewas.No,hewasn't.特殊疑问句Whatwashedoingatsixlastnight?2、过去进行时的固定句型Jimwasreadingwhentheteachercamein.当老师进来的时候,吉姆正在读书。JimwasreadingwhileKatewaswatchingTV.在凯特正在看电视的同时，吉姆正在读书。JimcameinwhileKatewaswatchingTV.在凯特正在看电视的时候，吉姆进来了。3、请比较HewatchedTVlastnight. （过去时间lastnight,用一1般过去时）HewaswatchingTVatninelastnight. （过去时间lastnight+点时间atnine,用过去进行时）二、Whenwhileas的区别和用法（1）主短从长：若主句表示的是一个短暂性动作，从句表示的是一个持续性动作，三者都可用：Hefellasleepwhen[while,as]hewasreading.他看书时睡着了。【注】as用于引出一个持续性动词表示“在・・・・・・期间”时，一般不能是那些不用于进行时态的动词（如be,seem,love,want,agree,see,know,have等），所以下面一句中的while不能换为as:Pmgoingtothepostoffice.我要去邮局。Whileyou9rethere,canyougetmesomestamps?当你在邮局时，能帮我买几张邮票吗？（2）主长从长：若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用while:Don'ttalkwhileyou9reeating.吃饭时不要说话。Ikeptsilentwhilehewaswriting.在他写的时候，我默不做声。但是，若主从句表示的两个同时进行的动作含有“一边…一边”之意思，通常用as:Shesangasshewentalong.她边走边唱。(3)主长从短：若从句是一个短暂性动作，主句是一个持续性动作，可用as/when但不用while:Itwasraininghardwhen[as]wearrived.我们到达时正下着大雨。(4)表示“每当・・・的时候”(暗示一种规律性)，一般要用when:Ifscoldwhenitsnows.下雪时天冷。Hesmileswhenyoupraisehim.你夸奖他时他总是笑笑。(5)若主从句所表示的动作不是同时发生，而是有先后顺序时，一般要用when:Iwillgohomewhenhecomesback.他回来时，我就回家去。(6)when和while后可接现在分词、介词短语、形容词等构成省略句，但as一般不这样用：When[While]reading,hefellasleep.他看书时睡着了。When[While]introuble,askherforhelp.遇到麻烦的时候你就去找她帮忙。Grammar练习一、用所给动词的适当形式填空NowJim'ssister(read)newspapers.He(watch)TVatninelastnight.Hermother(cook)whileherfatherwaswatchingTV.They(watch)afootballmatchfrom7:00to9:00lastnight.Lily(draw)acatwhentheteachercamein? No,sheyou(have)supperatthattime?Jack(notread)abookatnineyesterdayevening.NowJim(play)basketballontheplayground(操场).Whathe(do)atnineo'clocklastnight.They(listen)tothemusicatthattime.Whentheteachercamein,thestudents(read)thetext.We(watch)TVwhensuddenlythetelephonerang.二、单项选择( )1.Whatwereyoudoingthefirehappened?A.ifB.whileC.when D.since( )2.MaywasrunningtowardsMikehewastakingphotos.A.whenB.whileC.beforeD.if)3.TheGreenswitheachotherwhensomeoneknockedatthedoor.A.istalkingB.wastalkingC.aretalkingD.weretalking)4.Theboyhishomeworkwhenhisparentsin.A.wasdoing,werecomingB.did,comeC.did,werecoming D.wasdoing,came)5.1firstmetLisathreeyearsago.Sheataradioshopatthetime.A.hasworkedB.wasworkingC.worksD.isworking)6.WhilesheTV,sheasoundoutsidetheroom.A.waswatching,washearingB.watched,washearingC.watched,heardD.waswatching,heard)7.MyfatherTVinthesittingroomwhenIhomeyesterday.A.watched;gotB.waswatching;gotC.watched;wasgettingD.waswatching;wasgetting)8.一Whatwereyoudoingthistimeyesterday?---1onthegrassanddrawingapicture.A.sitB.satC.amsittingD.wassitting)9.---1calledyouat4:00yesterdayafternoon,butnooneanswered.一一Sorry,Iwithmyfriendsatthattime.A.swimB.swamC.willswimD.wasswimming)10.—Whatdidtheteachersayjustnow?—Sorry,Ididn'thearit.I：outofthewindow.A.look B.looked C.amlookingD.waslooking三、改错：每处划线中有错误，在题后改正Lindawaswritecarefullyatninelastnight.Tomorrowtheywereswimminginariver.Atthattime,shelisteningtotheradio.JimandIwasplayingwhenhecamein.IwasstudiingEnglishwhenheknockedatthedoor.Wereyoucooking