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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,1,Unit 13,We are trying to save the earth,！,Section B (,3,a-,Self check,),2,停顿乘小汽车,2.回收纸,3.用纸巾,4.好好利用,5.用垃圾建造房子,6.倒置,7.经营小生意,Revision,stop riding in cars,recycle paper,use paper napkins,put to good use,build a house out of rubbish,turn upside down,set up a small business,3,8.回复,归还,9.旧玻璃瓶,10.拆下,11.一个有创意的大脑,12.开一个小店,13.更受欢送的作品,14.给他人带来欢乐,bring back,old glass bottles,pull down,a creative mind,open a small shop,more popular works bring happiness to others,4,Turn off the lights when we leave a room.,Take our own bags when shopping.,Ride a bike.,Recycle paper.,Dont use paper napkins.,Warming up,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 and bags.,Organize people to clean up the streets,and rivers.,What should governments do to save the earth,Look,at these steps of making a basket by using the plastic bottle, and then try to make one by yourself.,6,7,Self Check,8,v. n.,n. adj.,pollute,fame,act,wood,protect,science,inspire,health,build,south,create,harm,1,Write different forms of the words.,Then add more to each group.,pollution,action,protection,inspiration,building,creation,famous,wooden,scientific,healthy,southern,careful,9,adj. n.,adj. adv.,different,slow,important ,wide,sudden,real,difference,importance,slowly,widely,suddenly,really,10,2,Mach each statement with the grammar structure.,Statement,Grammar,The river used to be so clean.,Present progressive,We have seen many changes in the environment.,Modal verbs,People should take public transportation more.,Passive voice,The river is polluted by factories.,used to,The air pollution is getting worse and worse.,Present perfect,:/ wenkuxiazai /doc/28bd958a4693daef5ef73d95-20.html,11,3,Write ways to cut down on these kinds,of pollution.,Kinds of pollution,ways to cut down,water pollution,land pollution,ask factories not to throw,waste into the river;,remind people not to litter,ensure that factories throw,away industrial waste in a,responsible way;,try not to use plastic bags,when shopping,12,Kinds of pollution,ways to cut down,noise pollution,air pollution,build airport away from,places where people live,encourage people to use,public transportation,instead of driving;,reduce the number of,factories that burn coal,Think 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 ？,Pair work,3a,Pair work,13,14,Good environment,Why,？,Bad environment,Why,？,park,river,streets,streets,restaurant,air,the air is clean,so many trees,clean and tidy,a lot of rubbish,so many cars,so many factories,Write 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,Writing,In your letter, describe the environmental,problems in your town/city.,3b,15,16,Then, give suggestions or possible,ways to solve the problems.,I think that,We should/ could,I suggest,17,本次写作内容是一封书信,信中首先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,然后提出解决这些环境问题的方法和措施,可以结合3中列举的问题和前面学过的解决方法来完成这封信。,写作指导,18,Dear 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,Sample writing,19,smoke and poisonous gas are given off by,factories. Factories also put waste into,the 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 people,from driving cars every day. I suggest,20,everyone in this town should help to,clean up the river and the streets. We,should call on everyone in the town to,throw 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,Jenny,21,互动课堂,(,探究与合作,),探究点,1,：,构词法,根据括号里的汉语意思写出单词,并体会这,些单词的构成方法。,Do you have a _ (报纸),2. The _(细心的) student made,a _(粗心的) mistake.,3. Please _(浇水)the tree with,some _ (水).,newspaper,careful,careless,water,water,22,英语中的常见构词法有,_,、,_,、,和,_,。,合成法：由两个或两个以上的词合成一个新词,这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。,如：,classroom(,名词,+,名词,),，,blackboard(,形容词,+,名词,),，,worldwide(,名词,+,形容词,), good-looking(,形容词,+,现在分词,), overcome (,副词,+,动词,),，,fifty-four(,数词,+,数词,), everything,，,somebody(,不定代词,+,名词,),等。,合成,转化,派生,23,(2),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。加在单词前的词缀叫,_,加在单词后的词缀叫,_,。,常见的,前缀,：,un-(,不,非,) unable, unimportant, untrue,dis,-(,不,非,),discover, disorder, discolored,bi-(,两个、双边的,) bicycle,inter-(,相互,) Internet, international, interview,前缀,后缀,24,re-,(,又,再,重新,),rewrite, retell, review,tele -(,远距离传输,电视,) telephone, television,常见的,名词后缀,：,-er/or(,人,) teacher, writer, foreigner, visitor,-ist(,人,) artist, scientist, tourist, terrorist,-ese(,民族,语言,) Chinese, Japanese,-tion(,动作,状态,) invitation,，,attraction,，,population,25,常见的,形容词后缀,:,-ful(,充满,) careful, colorful, useful, helpful,-y(,有,的,) cloudy, sunny, windy, lucky,funny,-al(,有,特点的,)traditional, international,，,natural,-able(,能够,) comfortable, unforgettable,-less(,没有，无,)homeless, helpless, careless,26,(3),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。单词转化后的意义往往与之前的意义联系密切。如：,water,n.,水,water,v.,浇水,slow,adj.,慢的 ,slow,v.,放慢,walk,v.,散步,走 ,walk,n.,散步,27,【拓展】缩写和简写(也称截断法或缩略法)主要采取“截头、“去尾或者“既截头又去尾的方法来生产新单词。如：,telephone phone airplane plane,laboratory lab mathematics math,advertisement ad examination exam,influenza flu,另外，还有很多缩写成是由各个单词的首字母组成，如：CD, CCTV, kg, NBA, UFO, UN, ID, USA, WWF,28,互动课堂,(,探究与合作,),探究点2：比较级的用法,读以下句子,注意画线局部的用法。,He is getting,fatter and fatter,.,他越来越胖了。,2. The flowers are,more and more beautiful,.,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。,4. This room is,(two times) bigger than,that one.,这个房间比那个房间大,(,三倍,),。,29,5. He runs (two times) faster than me.,他跑的速度比我快(两倍)。,6. Look at the two girls. My sister is the taller,of the two. 看那两个女孩,我姐姐是她们,中较高的那个。,7. The busier my father is, the happier he feels.,我父亲越忙，他感到越快乐。,8. Which is better，this one or that one？,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？,30,“比较级+and +比较级或 “more and more +原级(多音节或局部双音节词)，表示“_,and前面和后面,的比较级为同一个词的比较级。,(2) “甲+ be + (数词 + times + )形容词的比较级 + than + 乙或“甲+ 实义动词 + (数词 + times +) 副词的比较级+ than + 乙，意为 “_。,越来越,甲比乙,(,几倍,),31,(3) “甲+ be + the + _+ of the,two，意为“甲是两者中较的。,(4) “the + 比较级，the +_ 表示“越，越。,(5) “疑问词+ be + 形容词比较级, 甲 or 乙？或“疑问词 + 实义动词+ 副词的比较级, 甲 or 乙？ 表示 “_,比较级,哪一个更,甲还是乙？,形容词的比较级,32,同步课堂练习册,
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