Unit+1+Topic+2+Section+B 仁爱版九年级英语上册.pptx
Unit 1 The Changing WorldTopic 2 Section B 学习目标学习目标预习检测预习检测知识梳理知识梳理课堂总结课堂总结学习导航重点探究重点探究当堂当堂检测检测学习目标学习目标能熟悉并正确运用本能熟悉并正确运用本课时课时的重点的重点单词单词和短和短语语12能能够够掌握数字的拼掌握数字的拼读读1._thepopulationofIndia?_about1.27billion.A.Howmanyare;TheyareB.Howmuchis;ThatisC.Whatis;ItisD.Howis;Thisis2.Whichcountryhasthe_population,India,AmericaorChina?America.A.largestB.smallestC.leastD.fewest预习检测预习检测CB3.Howmanyworkersarethereinyourcompany?Aboutseven_.A.hundredB.thousandsC.hundredofD.thousandsof4.Chinahas_manypoliciestosolvetheproblem.A.carriedoutB.takenoutC.putoutD.givenout5.Tomworkshardeveryday._.Healwayspassesthedifficultexam.A.SoheisB.SoisheC.SohedoesD.SodoesheAAC知识梳理知识梳理Key points population是一个集合名词是一个集合名词 population常与定冠词the连用，作主语用时，谓语动词常用第三人称单数形式。e.g.Thepopulationisincreasingfasterandfaster.表示人口的多或少，不用much或little，而要用large或small。e.g.Indiahasalargepopulation.询问某国、某地有多少人口时,不用Howmuch.?,而用Howlarge.?;在问具体人口时用What.?。e.g.Howlargeisthepopulationofyourhometown?Key points And it is increasing by 82 million every year.increasev.(使)增加，（使)增大，增多。increaseby倍数或百分数，表示“增加了倍或百分之”。e.g.Comparedwithlastyear,ourpayhasincreasedbythreetimes.与去年相比，我们的工资增长了3倍。increaseto具体的增长后的数字，表示“增加到了”。e.g.Ourriceoutputhasincreasedto6milliontonsthisyear.我们的水稻产量今年增长到了600万吨。Key points So it is.该结构主要用于加强语气，其意为“的确如此、确实如此”，表示后者赞同前者的话或意见，只是进一步强调并重复前句所述的内容。前后句的主语指的是同一个人或物。该结构中的助动词do根据前文的情况也可换成is,am,are,was,were,does,did,can,could等。e.g.Hehasdoneagoodjob.他干得不错。Sohehas.他的确干得不错。Key points Luckily,China has already carried out some policies to solve the problem.carryout实行，进行，执行。e.g.Itwontbeaneasyplantocarryout.那并不是一个容易实施的计划。e.g.Thisisanewpolicy,andtheywillcarryitoutnextyear.这是一项新政策，他们将在明年实施它。探究一世界人口问题Lets watch a videoPresentation A:Whats the population of the world?B:Its about 7.2 billion.And it is increasing by 82 million every year.增加，增大人口7.2The population of the world:7.2 billionEvery year we have 82 million more.China:1.36 billion India:1.27 billionthe USA:323 millionRussia:143 millionCanada:36 milliontoo much _noisetoo many _peoplenkri:s增加_ is a big problem in China.That causes a lot of problems.Population increasek:z导致too much _smoke/pollutiontoo much _traffic1a Look,listen and say.Kangkang:Wow!Whatalargepopulation!Maria:What?Kangkang:Look,itsaystheworldhasapopulationof7.2billion.Anditisincreasingby82millioneveryyear.Maria:Mmm,thatsreallyalot.Whichcountryhasthelargestpopulation?Kangkang:Chinahasthelargestpopulation.Ithasalreadyreached1.36billion,andIndiaissecondwith1.27billion.Maria:WhatsthepopulationoftheUSA?Kangkang:323million.(Kangkang is reading a report on population in the newspaper.)Maria:Oh,Isee.Itshowsthatthepopulationindevelopingcountriesislargerthanthatindevelopedcountries,doesntit?Kangkang:Yes,Whatsmore,thepopulationindevelopingcountriesisgrowingfaster.Maria:Soitis.Thepopulationproblemhasbecomemoreseriousindevelopingcountries.Kangkang:Luckily,Chinahasalreadycarriedoutsomepoliciestosolvetheproblem.A：Whatalargepopulation!Theworld7.2billion.82millioneveryyear.B：Whichcountry?A：Chinareach,andIndiawith.B：theUSA?A：323million.B：Itshowsdevelopingcountriesdevelopedcountries.A：isgrowingfasterB：Soitis.Thepopulationproblemdevelopingcountries.A：Chinacarryoutsolvetheproblem.Act out the dialogRole play1b Listen to 1a and match the information.1.theworld2.China3.India4.theUSAA.323millionB.7.2billionC.1.36billionD.1.27billion1c Read 1a and fill in the blanks.The world has a population of 7.2 billion and it is increasingby_ every year._ has the largest population.It hasalreadyreached_andIndiais_with1.27billion.The population in developing countries is _ and is growing_ than that in developed countries.Luckily,our country hascarriedoutsomepoliciesto_theproblem.82millionChina1.36billionsecondlargerfastersolveThepopulationoftheworld:7.2billionEveryyearwehave82millionmore.China:1.36 billion India:1.27 billionthe USA:323 millionRussia:143 millionCanada:36 million3 Work in groups and discuss the population of the world.The following chart and questions may help you.1.Which of these 5 countries has the largest/smallest population?Whats the population of it?2.What can you tell from the population in developing countries and in developed countries?3.What problems does the large population cause?4.What measures do you think should be taken to solve the population problem?Chinahasthelargestpopulation.ThepopulationofChinais1.36billion.Canadahasthesmallestpopulation.ThepopulationofCanadais36million.Thepopulationindevelopingcountriesislargerthanthatindevelopedcountries.Thelargepopulationmaycauselesslivingspace,morepollutionandsoon.通过以上活动，我们可以总结出：现在世界人口已经达到72亿了，并且每年增长1._。其中中国是最多人口的国家，且人口达到2._；其次是印度，人口达到3._。而美国人口只有4._。当堂检测见当堂检测见DCFDCF课件课件活动小结活动小结82million1.36billion1.27billion323million探究二数字的表达方法Lets learn1,000,000,000 one billion1,000,000 one million1,000 one thousand3.14three point one four100 one hundred 朗读时，将每三位数看做一个单位，从右往左依次为thousand千，million百万，billion十亿。每个单位按照百、十、个位向下读，其中百位到十位之间要加入and。billion 十亿十亿e.g.1.3billion十三亿billion与million,thousand,hundred一样，在表示确切数字时，不能使用复数形式，但是，不表示确切数字时，如成百、成千、上万时，要以复数形式出现，且要与of连用，构成短语。e.g.hundredsof数百，成百上千的thousandsof成千上万的millionsof数百万billionsof数十亿1011101221431,00010,0001,000,000100,000,0001,000,000,000onehundredandoneonehundredandtenonehundredandtwenty-twoonehundredandforty-threeonethousand（千）tenthousand（一万）onemillion（百万）a/onehundredmillion（一亿）onebillion（十亿）A thousand million百位到十位之间要加入and。111,121,435,678billion十亿million百万thousand 千读：读：onehundredandelevenbilliononehundredandtwenty-onemillionfourhundredandthirty-fivethousandsixhundredandseventy-eight逗号读法逗号读法朗读时，将每三位数看做一个单位，从右往左依次为thousand千，million百万，billion十亿。每个单位按照百、十、个位向下读，其中百位到十位之间要加入and。6，500，431，729thousandmillionbillionhundredsevenhundredandtwenty-ninesixbillion,fivehundredmillion,fourhundredandthirty-onethousand,大数字的表达方法2 Listen and read the numbers,paying special attention to the intonation.Then read the other numbers with your partner.Practice98ninety-eight125onehundredandtwenty-five10256,6718,844.439,600,000onethousandandtwenty-fivesixthousandsixhundredandseventy-oneeightthousandeighthundredandforty-fourpointfourthreeninemillionsixhundredthousand读一读通过以上活动，我们可以总结出大数字的读法：朗读时，将每1._看做一个单位，从右往左依次为2._千，_百万，_十亿。每个单位按照百、十、个位向下读，其中百位到十位之间要加入3._。当堂检测见当堂检测见DCFDCF课件课件活动小结活动小结三位数thousandmillionbillionandSummaryUnit 1Topic 2 Section B重点单词population，increase等的用法数字的拼读
