Unit3语法专项课件过去进行时与whenwhile的用法-北师大英语八年级上册

教学课件北师大英语八年级上册Unit3语法专项——过去进行时与when/while的用法

全解精讲+分层练习

学习目标掌握过去进行时的核心含义、基本结构和动词-ing变化规则熟记过去进行时的时间状语，能正确判断使用场景掌握when和while的核心用法及区别，灵活搭配时态能运用过去进行时与when/while完成句式合并、转换熟练完成单选、填空、句型转换等多种题型，规避易错点过去进行时核心含义过去进行时表过去某一时刻/时间段正在进行的动作强调动作的持续性、进行性，即动作在过去某点正在发生区别于一般过去时的“动作完成”，侧重“动作正在进行中”常和具体过去时间点、when/while从句搭配使用过去进行时基本结构（肯定/否定）肯定句：主语+was/were+动词-ing形式主语为I/he/she/it/单数名词，用was；you/we/they/复数名词用were否定句：主语+was/were+not+动词-ing形式wasnot缩写为wasn’t，werenot缩写为weren’t，直接加在be动词后过去进行时疑问句结构一般疑问句：Was/Were+主语+动词-ing？把be动词提至句首，回答用Yes,主语+was/were./No,主语+wasn’t/weren’t.特殊疑问句：疑问词+Was/Were+主语+动词-ing？疑问词（what/when/where/how）置首，对动作/时间/地点提问动词-ing形式变化规则（表格1）变化类型具体规则

例词一般情况直接加-inglook→looking;read→reading;walk→walking不发音e结尾去e，再加-ingmake→making;take→taking;write→writing重读闭音节双写尾字母，加-ingrun→running;stop→stopping;sit→sitting动词-ing形式特殊变化规则以ie结尾的动词，变ie为y，再加-ing例词：lie→lying（躺）;die→dying（死）;tie→tying（系）这是高频特殊变化，无其他规律，需单独记忆注意：开音节动词无需双写，如open→opening（非重读闭音节）过去进行时常见时间状语具体时间点：at7o’clockyesterday;atthistimelastnight时间段：from8to10yesterdaymorning;thewholemorninglastSunday模糊时间：atthattime;justthen从句搭配：when/while引导的过去时间状语从句过去进行时例句1.Iwasdoingmyhomeworkat8o’clocklastnight.（昨晚八点我正在做作业。）2.Shewasn’treadingabookwhenIsawher.（我看到她时，她没在看书。）3.Weretheyplayingfootballontheplayground?（他们当时在操场上踢足球吗？）4.Whatwashedoingatthistimeyesterday?（昨天这个时候他在做什么？）when连词核心用法when引导时间状语从句，表“当……时候”从句动作可以是短暂性（瞬间完成）或延续性（持续进行）主句和从句动作可同时发生，也可先后发生时态搭配灵活，是使用范围最广的时间连词while连词核心用法while引导时间状语从句，表“在……期间”从句动作必须是延续性的，不能是瞬间动作强调主句和从句动作同时发生、持续进行从句常用进行时态，主句根据语境搭配时态when与while核心区别表连词从句动作类型动作发生关系时态搭配特点when短暂性/延续性同时/先后从句可普过时/进行时while仅延续性仅同时从句多为进行时核心句式1过去进行时+when+一般过去时表一个动作正在进行时，另一个短暂动作突然发生主句用过去进行时（延续动作），when从句用一般过去时（短暂动作）例句：IwaswalkinginthestreetwhenImetmyoldfriend.（我正在街上走，突然遇到了我的老朋友。）核心句式2过去进行时+while+过去进行时表两个延续性动作在过去同时进行主、从句均用过去进行时，强调“一边……，一边……”while可置句首或句中，置句首时用逗号与主句隔开例句：Whilemymomwaswashingclothes,Iwascleaningtheroom.when/while句式互换技巧当when从句表延续性动作时，可与while互换例句：Whenshewassinging,Iwasdancing.=Whileshewassinging,Iwasdancing.短暂性动作从句只能用when，不能用while例句：WhenIwasreading,thebellrang.（不可用while）过去进行时vs一般过去时核心辨析过去进行时：过去某点正在做，强调动作进行的状态，未体现完成一般过去时：过去做了，强调动作完成的结果，无进行状态时间状语不同：过去进行时常接具体时间点，一般过去时常接模糊过去时间例句：Hereadabookyesterday.（普过时，动作完成）

Hewasreadingat8yesterday.（过去进行时，正在读）语法小练单项选择

1.He______basketballwithhisfriendswhenIcalledhim.A.playsB.playedC.wasplayingD.isplaying2.______wewerehavingdinner,thephonerangsuddenly.A.WhenB.WhileC.BecauseD.If3.What______you______at9o’clocklastSundaymorning?A.do;doB.did;doC.are;doingD.were;doing4.Mysister______TVatthistimelastnight.A.watchesB.watchedC.waswatchingD.iswatchingCBDC5.Iwaswalkingtoschool______Isawadogontheroad.A.whenB.whileC.soD.but6.Whilemyfather______anewspaper,heheardaloudnoise.A.readsB.readC.wasreadingD.isreading7.Wereyou______tomusicwhentheteachercamein?A.listenB.listenedC.listeningD.listens8.She______not______herhomeworkat8lastnight.Shewasplaying.A.is;doingB.was;doingC.did;doD.does;doACCB9.______wasyourbrotherdoingwhentherainstarted?A.WhatB.WhenC.WhereD.How10.Whilethey______inthepark,theysawabeautifulbird.A.walkB.walkedC.werewalkingD.arewalking11.WhenIgottothecinema,themovie______,soImissedthebeginning.A.startsB.startedC.wasstartingD.isstarting12.______Janewaswritingaletter,herbrotherwasplayinggames.A.WhenB.WhileC.AfterD.BeforeACCB13.I______ashowerwhenthedoorbellrang.A.takeB.tookC.wastakingD.amtaking14.They______footballontheplaygroundfrom3to5yesterdayafternoon.A.playB.playedC.wereplayingD.areplaying15.—Whatwasshedoing?—She______abookinthelibrary.A.readsB.readC.wasreadingD.isreadingCCC语法小练用所给词适当形式填空

1.Whilemymother______(cook)breakfast,I__________(brush)myteeth.2.What______you__________(do)whenyourfathercameback?3.He________(notplay)computergamesat8lastnight.Hewasstudying.4.Whenthelightwentout,we_____________(watch)amovie.5.______(be)yoursister________(draw)apictureatthistimeyesterday?wascookingwasbrushingweredoingwasn’tplayingwerewatchingWasdrawing语法小练用所给词适当形式填空

6.Whilethey______(walk)inthepark,itstartedtosnow.7.I________(talk)withmyfriendonthephonewhenmymomcalledme.8.What______Tom___________(do)whenyousawhim?9.She_________(dance)intheroomwhileherbrother_________(sing).10.Whentheteachercamein,thestudents_____________(notread)books.wastalkingwasdoingwasdancingwassingingweren’treadingwerewalking语法小练句型转换

1.Iwasreadingamagazineat7lastnight.（改为一般疑问句）______you__________amagazineat7lastnight?2.Hewasplayingfootballwhenitrained.（对划线部分提问）______washe______whenitrained?3.Mybrotherwasdoinghishomework.Thedoorbellrang.（合并为一句）Mybrotherwasdoinghishomework______thedoorbellrang.WerereadingWhatdoingwhen语法小练句型转换4.TheywerewatchingTVwhiletheirparentswerecooking.（改为否定句）They____________________TVwhiletheirparentswerecooking.5.Shewaswashingclothesatthistimeyesterday.（对划线部分提问）______wasshewashingclothes?6.Iwaswalkingtotheshop.Imetmyteacher.（合并为一句）______Iwaswalkingtotheshop,Imetmyteacher.weren’twatchingWhenWhile7.Weretheyplayingbasketballontheplayground?（作否定回答）No,__________________.8.HewaswritingaletterwhenIsawhim.（用while改写，保持句意）__________hewaswritingaletter,Isawhim.9.Thestudentsweretalkingloudly.Theteachercamein.（合并为一句）Thestudentsweretalkingloudly______theteachercamein.10.Shewasnotsingingasong.Shewasdancing.（合并为一句）Whileshewasdancing,she____________asong.theyweren’tWhileWhenwasn’tsinging语法小练根据汉语完成句子

1.昨天下午四点，我正在画画。I____________apictureatfouryesterdayafternoon.2.当莉莉在做作业时，她的弟弟在看电视。______Lilywasdoingherhomework,herbrother____________TV.3.我正在听音乐，这时电话响了。I____________tomusic______thephonerang.4.昨晚九点你在做什么？What_________you________atnineo’clocklastnight?5.当我到达车站时，公交车正要离开。WhenIgottothestation,thebus____________.wasdrawingWhile