新概念青少版2Bunit21课件

Unit21Theweatherforecast1Unit21Theweatherforecast1RevisionWarming--upNewlessonPracticeSummaryTeachingcontents2RevisionWarming--upNewlessonPWarmingup3Warmingup3Warming-up1.Greetings:Hello,boysandgirls!Nicetoseeyouagain.2.Learnasong.T:What'stheweatherliketoday?4Warming-up1.Greetings:2.Learnrevision5revision5

Revision规则动词过去式的构成。1）变化规则：动词变化很好记，一般末尾加-ed;如果词尾有个e，紧跟其后加个-d；辅音加y来结尾，变y为i加-ed；单元+单辅，双写辅音加-ed注：特殊变化要熟记。2）读音规则：清后[t]，元浊[d]，[t],[d]后读[id]6Revision规则动词过去式的构成

Revision过去时的句子变化口诀：过去时，时过去。过去时态是否是，过去时间是标志。否定句很简单，did之后not添。疑问句也不难，did置于主语前。过去置于动词前，谓语动词需还原。7Revision过去时的句子变化口诀New

lesson8Newlesson8Whatisshetalkingabout?Listen!9WhatisshetalkingListen!9Theweatherforecastsnowycloudysunnyrainy10Theweatherforecastsnowycloudforecastv.预测，预报['fɔ:kɑ:st]11forecastv.预测，预报['fɔ:kɑ:st]11forecastern.预报员12forecastern.预报员12announcern.播音员，节目主持人[ə'naunsə]13announcern.播音员，节目主持人[ə'naunsə]gooverto转到14gooverto转到14thenextfew…接下来的几个……在接下来的几天天气将要变化。Theweatherwillchangeinthenextfewdays.15thenextfew…接下来的几个……在接下来的几天天气windn.风[wind]16windn.风[wind]16blowv.吹She’sblowingthedandelion.[bləu]17blowv.吹She’sblowingthedandesouthwest[ˌsauθˈwest]

n.西南

NSWEwestnortheastsouth18southwest[ˌsauθˈwest]

n.西Fromtoday,thewindwillblowfromthesouthwest.从今天起，风将会从西南部吹过来。19Fromtoday,thewindwillbloFromtomorrow,thewindwillblowfromthesoutheast.从明天起，风将会从东南部吹过来。20Fromtomorrow,thewindwillbringin带来21bringin带来21air[ɛə]

n.天空,大气22air[ɛə]

n.天空,大气22rain[rein]n.雨23rain[rein]n.雨23ThewindwillbringinwarmairfromtheAtlantic.风将从大西洋带来暖空气。bringinv.带来Atlanticn.大西洋24ThewindwillbringinwarmaiThewindwillbringinwetairfromAustralia.风将从澳大利亚带来潮湿的空气。25Thewindwillbringinwetairgradually[ˈgrædjʊəlɪ]

adv.逐渐地26gradually[ˈgrædjʊəlɪ]

adv.逐渐Rainwillcomeingraduallyfromthesouthwestthisevening.今天晚上，雨将会从西南方逐渐来临。27RainwillcomeingraduallyfrTherainisgraduallyheavy.雨逐渐地大起来了。28Therainisgraduallyheavy.雨逐n.阵雨rain

showerThewholecountrywillhavesomerainshowersinthenextthreedays.在接下来的三天，全国将会有一些阵雨。29n.阵雨rainshowerThewholecountThiscitywillhavelotsofrainshowersinthenextthreemonths.在接下来的三个月，这个城市将会有大量阵雨。30Thiscitywillhavelotsofrathermometern.温度计[θə'mɔmitə]31thermometern.温度计[θə'mɔmitə]31temperaturen.温度['tempəritʃə]32temperaturen.温度['tempəritʃə]3degreesCelsius摄氏度

[di'ɡri:z

'selsiəs]33degreesCelsius摄氏度

[di'ɡri:zrise上升34rise上升34fall[fɔ:l]v.降落,落下35fall[fɔ:l]v.降落,落下35Temperaturewillriseto12degreesCelsiusintheday.白天气温将会上升到12摄氏度。36Temperaturewillriseto12deNighttemperaturewillfallto4degreesCelsius.夜间气温将会下降至4摄氏度。37Nighttemperaturewillfallto[‘autluk]n.前景，展望theoutlookfor…对于……的前景outlook38[‘autluk]n.前景，展望theoutlookfoListentotherecording,andthenanswerthisquestion:Whatwilltheweatherbelikenextweek?听录音，然后回答问题：下周天气会怎么样？39Listentotherecording,andt4040Picture1Andnowit'sfivetonine,andtimefortheweatherforecast.Let'sgoovertoCarlaDaneattheLondonWeatherCenter.Carla.Announcer:

41Picture1Andnowit'sfivetoPicture2ThanksJohn,andgoodmorning!Lastmonthwasunusuallycoldanddry.Butallthatwillchangeinthenextfewdays.Weatherforecaster:

42Picture2ThanksJohn,andgoodPicture3Fromtoday,thewindwillblowfromthesouthwest.ItwillbringinwarmairfromtheAtlantic.Andwe'llhavesomerain.Weatherforecaster:

43Picture3Fromtoday,thewindPicture4Rainwillcomeingraduallyfromthesouthwestthisevening.Thewholecountrywillhavesomerainshowersinthenextthreedays.someofthemwillbeheavy.Weatherforecaster:

44Picture4RainwillcomeingraPicture5Temperatureswillriseto12degreesCelsiusintheday.Nighttemperatureswillfallto4degreesCelsius.Itwillfeelcoldoverthehills.Weatherforecaster:

45Picture5TemperatureswillrisPicture6Andtheoutlookfornextweekend:thethreew's—warm,wetandwindy.Andthat'syourweatherforecast.BacktoJohnatthestudio.Weatherforecaster:

46Picture6AndtheoutlookfornLet'spractice：GuidedConversation.对话练习。P4547Let'spractice：GuidedConversaLESSON42Pronunciation语音Weakforms:prepositions.英语中的介词常弱读，特别是最常见的介词of,for,from和at。当它们弱读时，或在短语的开头或者中间时，元音通常（但非一定）弱读为短元音/ə/。48LESSON42Pronunciation语音Weakmove[mu:v]

vt.&vi.移动;搬动49move[mu:v]

vt.&vi.移动;搬动49yet[jet]

adv.还,尚,仍然50yet[jet]

adv.还,尚,仍然50last[lɑ:st]

adv.最近一次的，延续;继续；51last[lɑ:st]

adv.最近一次的，延续;继续train[trein]

n.列车,火车；52train[trein]

n.列车,火车；52

will引导的一般将来时:表示将来发生的动作或存在的状态，最基本的结构：will+动词原形

肯定句：主语+will+动词原形+（宾语）+其他

Somedaypeoplewillgotothemoon.否定句：在will的后面加not即可。willnot可缩写为won’tTheywon’tusebooks.一般疑问句：把will提到句子主语之前，结尾变问号。Willstudentsgotoschoolinthefuture?特殊疑问句：特殊疑问词+will+主语+动词原形+其他？Whatwillyourdreamschoolhave?53will引导的一般将来时:表示将来发生的动作“Therebe”句型的一般将来时肯定句：

Therewillbe+名词+其他成份[注意]：无论后面加单数名词或复数形式，be都必须用原形。Therewillbeonlyonecountry.否定句：在will后面加not.Therewon’tbeonlyonecountry.一般疑问句：把will提到there之前。Willtherebeonlyonecountry?Yes,therewill./No,therewon’t.注意：在口语中，所有人称都可以用will.54“Therebe”句型的一般将来时注意：在口语中，所有人称一般将来时的主要用法：

1、表示将来某一时刻的动作或状态：

Wewillcometoseeyouthedayaftertomorrow.

Therewillbeawonderfulshownextweek.2、表示将来某一段时间内经常的动作或状态：

Thestudentswillcomeandworkinthelabonceaweek.

Wewillcomeandworkinthisfactoryeveryyear.55一般将来时的主要用法：1、表示将来某一时刻的动作或状态：55今天晚上我将会打电话给你。将来，学生将会使用电脑学习。我们今天下午没有空。她不会听我的.Iwillcallyouthisevening.StudentswillusecomputerstolearninthefutureWewon`tbefreethisafternoon.Shewillnotlistentome.56今天晚上我将会打电话给你。Iwillcallyout当天气变冷的时候，鸟类不会飞去南边我想下个夏天北京的天气将会非常热。他将会使用他的笔将会有大雨和大风天气。Thebirdswon`tflyawaytothesouthwhentheweatherturnscold.IthinkitwillbeveryhotinBeijingnextsummer.Hewillusehispen

Willtherebeheavyrainandstrongwinds?57当天气变冷的时候，鸟类不会飞去南边Thebirdswon肯定否定一般疑问回答Iwillhavemanypresents.Iwon`thavemanypresents.WillIhavemanypresents?Yes,Iwill.No,Iwon`t.Hewilldodulljobs.Hewon`tdodulljobs.Willhedodulljobs?Yes,hewill.No,hewon`t.Therewillbeacomputerinit.Therewon`tbeacomputerinit.Willtherebeacompuerinit.Yes,therewill.No,therewon`t.Theywilldoheavywork.Theywon`tdoheavywork.Willtheydoheavywork?Yes,theywill.No,theywon`t.will句式总结:58肯定否定一般疑问回答IwillhaveIwon`thFunctionalPractise：１.Ｉhopethat