9年级英语Unit13SectionB(3a-SelfCheck)课件分析.ppt

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1、9年级英语Unit13SectionB(3a-SelfCheck)课件分析Unit 13We are trying to save the earth！Section B(3a-Self check)21.1.停止乘小汽车停止乘小汽车2.2.回收纸回收纸3.3.用纸巾用纸巾4.4.好好利用好好利用5.5.用垃圾建造房子用垃圾建造房子6.6.倒置倒置7.7.经营小生意经营小生意 stop riding in cars recycle paper use paper napkins put to good use build a house out of rubbish turn upside d

2、own set up a small business 38 8.回回复复,归归还还 9 9.旧旧玻玻璃璃瓶瓶 1 10 0.拆拆下下 1 11 1.一一个个有有创创意意的的大大脑脑 1 1 2 2.开开 一一 个个 小小 店店 1 13 3.更更受受欢欢迎迎的的作作品品 1 14 4.给给他他人人带带来来欢欢乐乐 bring back old glass bottles pull down a creative mind open a small shop more popular works bring happiness to others4Turn off the lights whe

3、n we leave a room.Take our own bags when shopping.Ride a bike.Recycle paper.Dont use paper napkins.What should we do to save the earth?5 They should close down the factories that put waste into the river.Set up a lot of dustbins on the street.Stop people from using wooden chopsticks,plastic bowls an

4、d bags.Organize people to clean up the streets and rivers.What should governments do to save the earth?6Think about the environment in your town/city and complete the chart below.Which parts of the town/city have a nice environment?Why are they nice？Which parts need to be improved?Why？3a7Good enviro

5、nmentWhy？Bad environmentWhy？parkriverstreetsstreetsrestaurantairthe air is cleanso many treesclean and tidya lot of rubbishso many carsso many factories8Write a letter to the city mayor about the problem and your suggestions.What are the problems?Where are they?What or who is causing these problems?

6、In your letter,describe the environmental problems in your town/city.3b9Then,give suggestions or possible ways to solve the problems.I think that We should/could I suggest 10 本次写作内容是一封书信本次写作内容是一封书信,信中首先信中首先要介绍你所在城市存在有哪些环境问题要介绍你所在城市存在有哪些环境问题,是谁造成的这些问题是谁造成的这些问题,然后提出解决这然后提出解决这些环境问题的方法和措施些环境问题的方法和措施,可以结

7、合可以结合3 3中中列举的问题和前面学过的解决办法来完列举的问题和前面学过的解决办法来完成这封信。成这封信。11Dear Sir/Madam,Environmental problems are becoming more and more serious all over the world.With the development of the society,there are too many cars on the streets in your city.Cars have made the air unhealthy for people to breathe.Black 12s

8、moke and poisonous gas are given off byfactories.Factories also put waste intothe river.And wherever we go,we can find rubbish.Now more and more people have realized these problems.I think that governments should close down the factories and develop laws to stop peoplefrom driving cars every day.I s

9、uggest13everyone in this town should help to clean up the river and the streets.We should call on everyone in the town tothrow rubbish in the dustbins.I hope the problem will be solved in the near future and our home will become better and better.Yours faithfully,Jenny14Look at these steps of making

10、 a basket by using the plastic bottle,and then try to make one by yourself.1516v.n.n.adj.pollutefame act wood protect science inspire health build south create harm 1Write different forms of the words.Then add more to each group.pollutionactionprotectioninspirationbuildingcreationfamouswoodenscienti

11、fichealthysoutherncareful17adj.n.adj.adv.differentslow important wide sudden real differenceimportanceslowlywidelysuddenlyreally182 Mach each statement with the grammar structure.StatementGrammarThe river used to be so clean.Present progressiveWe have seen many changes in the environment.Modal verbs

12、People should take public transportation more.Passive voiceThe river is polluted by factories.used toThe air pollution is getting worse and worse.Present perfect 193Write ways to cut down on these kinds of pollution.Kinds of pollutionways to cut downwater pollutionland pollutionask factories not to

13、throw waste into the river;remind people not to litterensure that factories throwaway industrial waste in a responsible way;try not to use plastic bags when shopping20Kinds of pollutionways to cut downnoise pollutionair pollutionbuild airport away from places where people liveencourage people to use

14、 public transportation instead of driving;reduce the number of factories that burn coal 21互动课堂互动课堂(探究与合作)探究点探究点1 1：构词法构词法 根据括号里的汉语意思写出单词根据括号里的汉语意思写出单词,并体会这并体会这些单词的构成方法。些单词的构成方法。1.Do you have a _(报纸报纸)?2.The _(细心的细心的)student made a _(粗心的粗心的)mistake.3.Please _(浇水浇水)the tree with some _(水水).).newspaper

15、carefulcarelesswaterwater22 英语中的常见构词法有英语中的常见构词法有_、_、和和_。合成法：由两个或两个以上的词合成一个新词合成法：由两个或两个以上的词合成一个新词,这这种构词法叫作合成法。合成法可以构成名词、形种构词法叫作合成法。合成法可以构成名词、形容词、动词、数词、介词等。容词、动词、数词、介词等。如：如：classroom(名词名词+名词名词)，blackboard(形容词形容词+名词名词)，worldwide(名词名词+形容词形容词),good-looking(形形容词容词+现在分词现在分词),overcome(副词副词+动词动词)，fifty-four(

16、数词数词+数词数词),everything，somebody(不定代不定代词词+名词名词)等。等。合成合成转化转化 派生派生23(2)派生法：在一个单词前面或后面加上一个派生法：在一个单词前面或后面加上一个词缀构成新词，这种构词法叫做派生法。加词缀构成新词，这种构词法叫做派生法。加在单词前的词缀叫在单词前的词缀叫 _,加在单词后的加在单词后的词缀叫词缀叫_。常见的常见的前缀前缀：un-(不不,非非)unable,unimportant,untrue dis-(-(不不,非非)discover,disorder,discolored bi-(两个、双边的两个、双边的)bicycle inter-

17、(相互相互)Internet,international,interview前缀前缀后缀后缀24re-(又又,再再,重新重新)rewrite,retell,reviewtele-(远距离传输远距离传输,电视电视)telephone,television常见的常见的名词后缀名词后缀：-er/or(人人)teacher,writer,foreigner,visitor-ist(人人)artist,scientist,tourist,terrorist-ese(民族民族,语言语言)Chinese,Japanese-tion(动作动作,状态状态)invitation，attraction，popula

18、tion25常见的常见的形容词后缀形容词后缀:-ful(充满充满)careful,colorful,useful,helpful-y(有有的的)cloudy,sunny,windy,lucky,funny-al(有有特点的特点的)traditional,international，natural-able(能够能够)comfortable,unforgettable-less(没有，无没有，无)homeless,helpless,careless26(3)转化法：一个单词由一种词类转换为另一转化法：一个单词由一种词类转换为另一种词类，这种构词法叫转换法。单词转化后种词类，这种构词法叫转换法。单

19、词转化后的意义往往与之前的意义联系密切。如：的意义往往与之前的意义联系密切。如：water n.水水 water v.浇水浇水 slow adj.慢的慢的 slow v.放慢放慢 walk v.散步散步,走走 walk n.散步散步27【拓展拓展】缩写和简写缩写和简写(也称截断法或缩略法也称截断法或缩略法)主要主要采取采取“截头截头”、“去尾去尾”或者或者“既截头又去尾既截头又去尾”的方法来生产新单词。如：的方法来生产新单词。如：telephone phone airplane plane laboratory lab mathematics math advertisement ad exa

20、mination exam influenza flu另外，还有很多缩写成是由各个单词的首字母组另外，还有很多缩写成是由各个单词的首字母组成，如：成，如：CD,CCTV,kg,NBA,UFO,UN,ID,USA,WWF28当堂过关当堂过关 即学即练即学即练(参见参见探究学案探究学案)29互动课堂互动课堂(探究与合作)探究点探究点2 2：比较级的用法比较级的用法 读下列句子读下列句子,注意画线部分的用法。注意画线部分的用法。1.He is getting fatter and fatter.他越来越胖了。他越来越胖了。2.The flowers are more and more beautif

21、ul.花儿越来越漂亮。花儿越来越漂亮。3.I got up earlier than my brother today.我今天比我哥哥起得早。我今天比我哥哥起得早。4.This room is(two times)bigger than that one.这个房间比那个房间大这个房间比那个房间大(三倍三倍)。305.He runs(two times)faster than me.他跑的速度比我快他跑的速度比我快(两倍两倍)。6.Look at the two girls.My sister is the taller of the two.看那两个女孩看那两个女孩,我姐姐是她们我姐姐是她们

22、中较高的那个。中较高的那个。7.The busier my father is,the happier he feels.我父亲越忙，他感到越高兴。我父亲越忙，他感到越高兴。8.Which is better，this one or that one？哪一个好一些，这个还是那个？哪一个好一些，这个还是那个？9.Who draws better,Mike or Jack？谁画得比较好，迈克还是杰克？谁画得比较好，迈克还是杰克？31(1)“比较级比较级+and+比较级比较级”或或 “more and more+原级原级(多音节或部分双音节词多音节或部分双音节词)”，表，表示示“_”,and前面和后

23、面前面和后面 的比较级为同一个词的比较级。的比较级为同一个词的比较级。(2)“甲甲+be+(数词数词+times+)形容词的比较级形容词的比较级+than+乙乙”或或“甲甲+实义动词实义动词+(数词数词+times+)副词的比较级副词的比较级+than+乙乙”，意为，意为“_”。越来越越来越甲比乙甲比乙(几倍几倍)32(3)“甲甲+be+the+_+of the two”，意为，意为“甲是两者中较甲是两者中较的的”。(4)“the+比较级，比较级，the+_”表示表示“越越，越，越”。(5)“疑问词疑问词+be+形容词比较级形容词比较级,甲甲 or 乙？乙？”或或“疑问词疑问词+实义动词实义动词+副词的比较级副词的比较级,甲甲 or 乙？乙？”表示表示“_?”比较级比较级哪一个更哪一个更,甲还是乙？甲还是乙？形容词的比较级形容词的比较级33当堂过关当堂过关 即学即练即学即练(参见参见探究学案探究学案)34探究学案探究学案导学分级训练导学分级训练P73-P7435谢谢