Unit5nature'stemper(sectionA4a4dGrammarFocus)课件人教版八年级英语下册

unit5Nature’sTemperSectionA4a-4dTeachingObjectives1.学生能够掌握过去进行时的结构(was/were+v.-ing)及其句型结构，同时能够区分when和while引导的时间状语的差异。2.学生能够运用过去进行时描述自然灾害发生时人们正在做什么，或解释灾难发生的原因。3.学生理解在灾难叙事中时间顺序的重要性，并思考“预防”与“应对”的关系。contentPresentation02Practice03Lead-in01Production04Summary05Lead-inWhatweretheydoingatthetimeof_________?Theywere____________whentheirneighbourcalled.floodhavingdinnerLookatthepicturesandfillintheblanks.Whatwasshedoingwhenthe__________came?Shewas_________________whenthebuildingshookallofasudden.earthquakedoingherhomeworkWhatwasshedoingwhenthe________wasburning?Shewas__________atthattime.wildfireshoppingLookatthepicturesandfillintheblanks.Whatweretheydoingwhilethe_________wasblowing?typhoonhavingdinnerTheboywas______________onTVwhilehismother_____________thefloor.watchingnewswassweepingpresentationShewasdoinghomeworkwhenthebuildingshookallofasudden.Theywerehavingdinnerwhentheirneighbourcalled.Shewasshoppingatthattime.TheboywaswatchingnewsonTVwhilehismotherwassweepingthefloor.was/were+v.-ing过去进行时定义：表示过去某个时刻或某一时间段正在进行或发

生的动作。时间标志词：atthis/thattimeyesterday,at9:00yesterdaymorning,allnight等；或以when,while引导的时间状语从句。Readthechartandunderlinethepastcontinuoustense.构成：基本结构：主语+was/were+doing+其他。否定形式：主语+wasn’t/weren’t+doing+其他。一般疑问句：Was/Were+主语+doing+其他？肯定回答：Yes,主语+was/were.否定回答：No,主语+wasn’t/weren’t.特殊疑问句：特殊疑问词+was/were+主语+doing+其他？when和while用法小结相同点：when和while都可以作从属连词。引导时间状语从句。都有“当……的时候”的意思。引导的时间状语从句从句中的谓语动词动作发生时间whenwhile不同点1：指时间段和时间点可以是延续性动词和终止性动词一般指一段时间表状态的延续性动词一前一后或同时发生同时发生有时when可以代替while，而while则不能代替when。Practicemakesperfect.Itwasraining________theyarrived.Mymothercameback________Iwascleaningmybedroom.whenwhile1.WhileAlanwaswritingaletter,thechildren_____outside.A.playB.wereplayingC.willplay2.Jack_____ashowerwhenhismotherranghimup.A.takesB.hastakenC.istakingD.wastakingPracticemakesperfect.3.—Isawthelightofyourroomwasstillonattwoo’clocklastnight.—Oh,I_____afootballmatchoftheRussiaWorldCup.A.watchedB.waswatchedC.amwatchingD.waswatching4b1.Ididmyhomework.Thetyphoonlandedonthecoast.2.Thepowerwentout.MyfatherandImadedinner.3.Katewrotealetter.Herbrothercalledtowarnherofthestorm.4.Myparentspackedthesupplies.Imovedourthingsoffthefloor.5.Isleptsoundly.Itrainedcatsanddogs.Combineeachpairofsentencesusingwhenorwhile.4bCombineeachpairofsentencesusingwhenorwhile.Iwasdoingmyhomeworkwhenthetyphoonlandedonthecoast.WhilemyfatherandIweremakingdinner,thepowerwentout.Katewaswritingaletterwhenherbrothercalledtowarnherofthestorm.

Whilemyparentswerepackingthesupplies,Iwasmovingourthingsoffthefloor.Iwassleepingsoundlywhileitwasrainingcatsanddogs.4cCompletethepassagewithwas,were,when,orwhile.WhenJennylookedup,thickblackcloudswereforminginthesky,andtherain______beatingagainsttheirroof."Quick,thisway,"saidDad.Thefamilyrantothesaferoomatonce.______theywerewaiting,Jenny'slittlesisterstartedtocry.Dadgavehersomechocolateandtoldherthatthey______hidingfromanangrylion.Soon,shewaslaughingagain.Atlast,thestormpassed.______theysteppedoutside,theyfoundthesunshining.Peoplewereaskingoneanotheriftheyweresafewhilesome______startingtoclearthestreets.Jennysmiled.Thetornadowasscary,butitalsobroughteveryoneclosertogether.wasWhilewereWhenwere4cImaginethatyouareareporter.InterviewamemberofJenny'sfamilyandfindoutwhatheors