Unit5Nature'sTemperSectionA(4a4d)课件人教版八年级英语下册

Unit5Nature’sTemperSectionAWhathappensduringanaturaldisaster?4a-4dPART.01LearningObjectives思维品质学习能力文化意识语言能力教学目标掌握过去进行时的结构与用法，准确描述过去正在进行的动作。区分when和while引导时间状语从句的逻辑差异。了解不同文化中描述灾害、突发场景的语言习惯，感受人类应对突发事件的共情表达，增强跨文化语言理解。掌握语法规则梳理、语境运用的策略，提升自主完成语法练习与情景对话的能力，培养时态运用的准确性。通过分析过去动作的时间关联，提升逻辑判断与事件梳理能力，学会用时态清晰地表达过去场景的先后与同步关系。笔顺教学重难点掌握过去进行时的结构，能准确区分when与while的用法。能完成句子合并、语篇填空，并用过去进行时完成情景对话。在真实语境中灵活选择when/while，准确表达过去动作的同步或先后关系。在情景对话中，用过去进行时连贯描述灾害等突发场景，提升语言的逻辑性与流畅性。0102PART.02Lead-inWatchavideoandlearnaboutthestructureofthepastcontinuoustense.PART.034a—4d(GrammarFocus)过去进行时1.过去进行时的构成：was/were+动词-ing2.动词-ing形式的变化规则Presentation一般情况直接加-inglook→looking、work→working以不发音的字母e结尾：去e加-ingtake→taking、write→writing以“辅音字母+元音字母+辅音字母”结尾的重读闭音节动词如果末尾只有一个辅音字母，要双写这个辅音字母，再加-ingshop→shopping、sit→sitting、plan→planning以ie结尾的动词：变ie为y加-inglie→lying、tie→tying、die→dying注意：易错特殊情况（必记）（1）单音节动词以w、x、y结尾（辅+元+辅）：不双写，直接加-ingdraw→drawing、fix→fixing（2）非重读闭音节（辅+元+辅）：不双写，直接加-ingopen→opening3.句式结构（1）肯定句：主语+was/were+动词-ing形式+其他.Iwasreadingabookat8:00lastnight.昨晚八点我正在看书。（2）否定句：主语+was/were+not+动词-ing形式+其他.Shewasn’twatchingTVjustnow.她刚才没在看电视。Presentation（3）一般疑问句及答语：Was/Were+主语+动词-ing形式+其他?肯定回答：Yes，主语+was/were.否定回答：No，主语+was/werenot.—Washecookingwhenyoucamein?你进来的时候他在做饭吗？—Yes,hewas./No,hewasn’t.是的，他在。/不，他没有。（4）特殊疑问句：特殊疑问句+was/were+主语+doing+其他?回答需具体说明，不能用Yes/No。—Whatwereyoudoingatthattime?你那时在做什么？—Iwasreading.我在看书。Presentation4.过去进行时的用法（1）表示过去某一时刻正在发生的动作，或过去某一个阶段内一直在进行的动作，常用的时间状语有：atthis/thattime+过去时间、at...o’clock+过去时间、from...to...+过去时间、thosedays（那些日子）、justnow（刚才；刚刚）Hewasplayingthepianoat5:00yesterdayafternoon.昨天下午五点他正在弹钢琴。Theywereworkingonthefarmalldayyesterday.昨天一整天他们都在农场干活。（2）表示一个过去的动作正在进行时，另一个过去的动作发生了，常与when,while引导的时间状语从句连用。IwaswatchingTVwhenmyfathercameback.我正在看电视，这时爸爸回来了。Whilehewaswaitingforthebus,hereadabook.他在等公交车的时候看了一本书。Presentationwhen与while引导的时间状语从句一、概述when和while都可意为“当……时”，用来引导时间状语从句，表示主句动作发生的背景。从句可位于主句之前或之后，当位于主句之前时，与主句要用逗号分开。延续性动词和非延续性动词：延续性动词指动作可以延续一段时间，而不是瞬间结束。work、study、drink、eat等。非延续性动词指动作极为短暂，瞬间结束。start、begin、hit、jump、knock等。二、when引导的时间状语从句1.表示主句动作发生的特定时间，既可指时间点，也可指时间段。Iwasdoingmyhomeworkwhenhecamein.他进来的时候，我正在写作业。Presentation2.when引导的时间状语从句中的谓语动词可用延续性动词，也可用非延续性动词。从句的动作可与主句的动作同时发生，也可在主句动作之前或之后发生。Whenthebusstopped,wegotoffquickly.公交车停下时，我们迅速下了车。Heoftenlistenedtomusicwhenheworked.他工作时经常听音乐。3.当主句为将来时或表示将来的意义时，从句要用一般现在时表示将来，即遵循“主将从现”的原则。IwillcallyouwhenIarriveinBeijing.我到北京后会给你打电话。Wewillgocampingwhentheweatherisfinetomorrow.明天天气好的话，我们就去露营。Whenhecomes,pleaseletmeknow.他来的时候请告诉我一声。Presentation三、while引导的时间状语从句1.while引导时间状语从句时，从句的谓语动词必须为延续性动词，且常用进行时。PleasebequietwhileIamteaching.我在讲课的时候请安静。2.强调主句动作发生时，从句动作正在进行，此时，从句用进行时。Whileshewasdoingherhomework,thelightwentout.她正在写作业的时候，灯灭了。Whilewewerewalkinghome,itstartedtorain.我们正走在回家路上时，天开始下雨了。3.强调主从句动作同时进行时，主从句通常都用进行时。Iwasreadingwhilemymotherwascooking.我在看书，妈妈在做饭。Theyweresingingwhileweweredancing.他们在唱歌，我们在跳舞。Presentation四、when和while的核心区别Whenheknockedatthedoor,Iwassleeping.他敲门时，我正在睡觉。Iwasreadingwhenthelightwentout.我正在看书，这时灯突然灭了。TomwasreadingwhileMarywasdrawing.汤姆在看书，而玛丽在画画。Presentation情况用when用while从句是瞬间动作✅可以❌不可以从句是延续动作✅可以✅可以表示“这时突然”✅可以❌不可以表示对比“而……”❌不可以✅可以Practice4aReadthesentences.Underlinetheverbswhichshowanongoingactioninthepast.Whatwereyoudoingwhileitwassnowingheavily?Iwastravellingonthetrainthen.Whatwereyourfamilydoingwhenthetyphoonhit?MychildrenandIwerereadingtogether.Whenmyneighbourcalled,myfamilywerehavingdinner.Weweredrivinghomewhenthestrongwindsstarted.Whileweweredrivinghome,thestrongwindsstarted.Itwasraininghardwhileweweredrivingback.Practice4bCombineeachpairofsentencesusingwhenorwhile.1.Ididmyhomework.Thetyphoonlandedonthecoast.I

was

doing

my

homework

when

the

typhoon

landed

on

the

coast.2.Thepowerwentout.MyfatherandImadedinner.The

powerwentout

while

my

father

and

I

were

making

dinner.3.Katewrotealetter.Herbrothercalledtowarnherofthestorm.Kate

was

writing

a

letter

when

her

brother

called

to

warn

her

of

the

storm.4.Myparentspackedthesupplies.Imovedourthingsoffthefloor.While

my

parents

were

packing

the

supplies,

I

was

moving

ourthings

off

the

floor.5.Isleptsoundly.Itrainedcatsanddogs.Iwassleepingsoundlywhenitrainedcatsanddogs.（火或灯光）熄灭warnsbof...警告某人……下倾盆大雨PracticeEachsentencehasonemistake.Underlinethemistakeandwritethecorrectsentence.MymotherwascookedlunchwhileIwashelpingmybrotherwithhishomework.Whileitrainedheavilyoutside,weweresitintheclassroomreadingstorybooks.Whentheearthquakehappened,peopleruninalldirectionsquickly.IwaswaitingatthebusstopwhenIseemybestfriendpassingby.Whilewewerecleanthehouse,thepowerwentoutandeverythingbecamedark.MymotherwascookinglunchwhileIwashelpingmybrotherwithhishomework.Whileitwasrainingheavilyoutside,weweresittingintheclassroomreadingstorybooks.Whentheearthquakehappened,peopleraninalldirectionsquickly.IwaswaitingatthebusstopwhenIsawmybestfriendpassingby.Whilewewerecleaningthehouse,thepowerwentoutandeverythingbecamedark.Practice4cCompletethepassagewithwas,were,when,orwhile.Thefamilyrantothesaferoomatonce._______theywerewaiting,Jenny’slittlesisterstartedtocry.Dadgavehersomechocolateandtoldherthatthey_______hidingfromanangrylion.Soon,shewaslaughingagain.Atlast,thestormpassed._______theysteppedoutside,theyfoundthesunshining.Peoplewereaskingoneanotheriftheyweresafewhilesome_______startingtoclearthestreets.Jennysmiled.Thetornadowasscary,butitalsobroughteveryoneclosertogether.WhenJennylookedup,thickblackcloudswereforminginthesky,andtherain_______beatingagainsttheirroof.“Quick,thisway,”saidDad.waswereWhileWhen

were互相，彼此立刻，马上抬头看Production4dImaginethatyouareareporter.InterviewamemberofJenny’sfamilyandfindoutwhatheorshewasdoingaroundthetimeofthetornado.A:Whatwereyoudoingwhenthetornadohit?B:MyfamilyandIwerehidinginasaferoom.A:Whatwereyoudoingwhileyouwerewaitingthere?B:Oh,whileI...ProductionA:Whatwereyoudoingwhenthetornadohit?B:MyfamilyandIwerehidinginasaferoom.A:Whatwereyoudoingwhileyouwerewaitingthere?B:Oh,whileIwaswaiting,Istartedtotellstoriestomylittlesistertomakehernotafraid.Sample4dImaginethatyouareareporter.InterviewamemberofJenny’sfamilyandfindoutwhatheorshewasdoingaroundthetimeofthetornado.PART.04LanguagePoints1.Thepowerwentout.停电了。power①电力供应Manyhouseslostpowerbecauseoftheheavystormlastnight.昨晚的强暴风雨导致许多房屋停电。②能量；力量ThesunprovideslightandpowerforalllivingthingsonEarth.太阳为地球上所有生物提供光和能量。③驱动；推动Thisnewcarispoweredbycleanenergyinsteadofoil.这辆新车由清洁能源驱动，而不是汽油。④权力；职权Heisamanwithgreatpowerinthisbigcompany.他在这家大公司里是一个拥有很大职权的人。2.When

Jenny

looked

up,thick

blackcloudswereforming

in

the

sky,and

the

rain

was

beating

against

their

roof.当珍妮抬头看时，天空中正在形成厚厚的乌云，雨水敲打着他们的屋顶。lookup抬头看；查阅Whenyoumeetnewwords,youcanlookthemupinthedictionary.当你遇到生词时，可以在词典里查阅它们。lookafter照顾Weshouldlearntolookafterourselveswhenourparentsarebusy.父母忙碌时，我们应该学会照顾自己。lookaround环顾Hestoodupandlookedaroundtheclassroomtoseewhowaslate.他站起来，环顾教室，看看谁迟到了。lookthrough快速查看；浏览IusuallylookthroughthenewsbeforeIstarttodomyhomework.我通常在写作业前先浏览一下新闻。lookforwardto盼望Wearealllookingforwardtothesummerholidayandahappytrip.我们都在盼望暑假和一次愉快的旅行。lookfor寻找I’mlookingformykeyeverywhere,butIstillcan’tfindit.我正在到处寻找钥匙，但还是找不到。looklike看起来像

Thelittlegirllookslikehermother,andtheybothhavebigeyes.这个小女孩长得像她妈妈，她们都有大眼睛。lookover查看；检查Thedoctorlookedoverthepatientcarefullyandaskedabouthisillness.医生仔细检查了病人，并询问了他的病情。lookout小心Lookout!Acariscomingquicklytowardsyou.小心！一辆车正快速向你开来。3.Peoplewereaskingoneanotheriftheyweresafewhilesomewerestartingtoclearthestreets.当一些人开始清理街道时，人们在互相询问是否安全。if在此引导宾语从句（宾语从句应用陈述语序），常用于ask、know、findout、wonder等动词（短语）之后。Iwanttoknowifhewillcometotheparty.我想知道他是否会来参加派对。Couldyoutellmeifthereisahospitalnearhere?你能告诉我这附近是否有医院吗？PART.05ExercisesExercise—连词成句1.hisway,he,to,made,the,shelter,when,earthquake,the,started(.)__________________________________________________________________________2.important,for,it,is,us,to,respect,cultures,different,when,crossing,borders(.)__________________________________________________________________________3.thegame,started,while,was,I,still,ontheway,tothestadium.__________________________________________________________________________4.rang,I,myhomework,whilethetelephone,wasdoing(.)__________________________________________________________________________5.out,the,went,elevator,lights,riding,while,Jeremy,was,the(.)__________________________________________________________________________Itisimportantforustorespectdifferentcultureswhencrossingborders.ThegamestartedwhileIwasstillonthewayto