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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,*,Unit,2,Sav,ing,the,Earth,Topic 2,All these problems are very serious.,Section B,Earth Song mp4,揭西县第一中学 陈伟婷,soil pollution,air pollution,light pollution,noise pollution,litter,The wind is blowing strongly with,lots of,sand,. We call it,sandstorm,.,snd, n.,沙,沙子,sndst:m, n.,沙尘暴,Do you know how sandstorms,come into being,(,形成,),?,Now please look at the pictures in 1c and number them.,Number the pictures and then talk about them,.,( ),( ),( ),( ),( ),( ),4,1,5,3,6,2,many trees,forests gone,People have,cut down,too many trees.,cut down,砍倒,wash the earth away,A lot of earth has been washed away. Why?,Because people have cut down too many trees.,1.Trees also,stop,the wind,(from),blowing,the earth away.,2.They can also,prevent,the water,(from),washing the earth away.,prevent ,privent, v.,防止，预防,点拨：,stop sb./,sth,. (from) doing,sth,.,= prevent sb./,sth.(from,) doing,sth,.,阻止,做某事,链接：同义词组,keep sb./,sth,. from doing,sth,.,阻止,做某事,(from,可以省略,),(from,不可以省略,),change into,转换成，把,变成,desert ,dezt, n.,沙漠,The forest has,changed into desert.,sandstorms come into being,Talk about how sandstorms come into being,.,cut down trees,many trees,forests gone,wash the earth away,change into desert,sandstorms come into being,Listen to 1a, answer the questions.,What are they talking about?,What causes this kind of bad weather?,They are talking about sandstorms,.,People have cut down too many trees.,A lot of rich land has changed into desert.,（录音,p35-1a,）,Cutting down too many trees,is harmful not only to,human,beings, but also to animals and plants.,human being,人,Watch the cartoon and answer,the question.,What are trees functions?,Trees can stop the wind from blowing,the earth away.,A lot of water can be saved by forests.,Trees can also prevent the water from,washing the earth away.,A.,B.,C.,35-1a.swf,In order to protect the,environment,we,have built “The Great Green Wall”.,Although,we have built “The Great,Green Wall”, we still need to work,hard to protect the environment.,although ,:lu, conj.,虽然，尽管,同义词组,: though,、,even if / though,注意：,although,、,though,引导的从句不能与,but,、,however,同时出现在一个句子中，只能用其,中一个。,Although,he was old,but,he worked hard.,Although,he was old, he worked hard.,He was old,but,he worked hard.,在,1a,中找到并划出下面的短语,1.,刮大风,2.,伴有很多沙尘,3.,走在路上,4.,刚才,5.,砍伐太多的树木,6.,造成沙尘暴,7.,结果,8.,大量富饶的土地,9.,变成沙漠,10.,阻止大风刮走泥土,11.,阻止流水冲走泥土,12.,对人类有害,13.,绿色长城,14.,需要努力工作,1.,刮大风,blow strongly,2.,伴有很多沙尘,with lots of sand,3.,走在街上,walk down the street =,walk along/on the street,4.,刚才,just now =,a moment ago,5.,砍伐太多的树木,cut down too many trees =,cut too many trees down,6.,造成沙尘暴,cause/,creat,these sandstorms,7.,结果,as a result,8.,大量富饶的土地,a lot of rich land,9.,变成沙漠,change into desert =,turn into desert,10.,阻止大风刮走泥土,stop the wind from blowing the earth away,11.,阻止流水冲走泥土,prevent the water from washing the earth away,12.,对人类有害,be harmful to human beings =,do harm to human beings,13.,绿色长城,The Great Green Wall,14.,需要努力工作,need to work hard,What bad,weather,! =,How bad the weather is!,总结：,What,引导的感叹句,What (a/an)+,形容词,+,_,+,（,S+V,）！,链接：,How,引导的感叹句,a. How + _+,（,S+V,）！,常用于感叹句中的不可数名词有,:food, news, work, weather, music,，,fun,等,形容词,/,副词,名词,练习：,（一）用 “,what”,或“,how”,填空,1,）,_,high,（,Wu,Peng,jumps,）,！,2,）,_ an interesting,film,（,it is,）,！,3,）,_,bright,（,the sun is,）,!,4,）,_,well,（,he writes English,）,！,5,）,_,useful,work,（,they have done,）,!,What,What,How,How,How,2,. I could,nt,see,anything, and my face hurt,while,I was walking down the street just now.,点拨：,notanything = _,练习：,The police found nothing in the room. =,The police,_,find,_,in,the room.,点拨：,while,引导的从句的谓语动词必须是,_,。,nothing,didnt,anything,延续性的,3,. But,what causes,these sandstorms?,在这个句子中，特殊疑问词作,_,，谓语动词用,_,_,数形式；特殊疑问词作主语时，本身就是陈述语序，因此改成,间接引语,时,_,不变。,Can you tell me _?,主语,单,语序,What causes these,4,.As a result, a lot of rich land has,changed into,desert.,点拨,：,change into,（把,变成,）,=,练习,：,1),他们正在使沙漠变成农田。,They are _desert_ farmland.,2)Could you change this article into English?,译：,_,_,changing,into,你能把这篇文章翻译成英语吗？,turn into,5,.a)Trees can also,stop,the wind,(from),blowing the earth away.,b)They,can also,prevent,the water,(from),washing the earth away.,练习,:,大雨使我们无法外出。,The heavy rain prevented us from going,out yesterday.,b._,c._,The heavy rain stopped us from going out yesterday.,The heavy rain kept us from going out yesterday.,6. And a lot of water,can be saved,by forests.,本句话用了含有情态动词的被动语，,结构：,_,同义句：,Forests _ _ a lot of water.,情态动词,+ be +,过去分词,can save,7.,Cutting down trees,is,harmful to human beings, animals and plants.,思考,：,cutting down trees,是,_,在句,中作,_,语，谓语用,_,数。,练习：,1),散步是我的爱好。,_ _,my hobby.,2),打乒乓球很有意思。,_ _ _great fun.,3),阅读使人完美。,_ _,a man,_,.,动名词短语,主,单,Walking is,Playing Ping-pong is,Reading makes,perfect,注意：,cut down,是动副短语,代词作宾语,时要放在,_,。,如：树对我们是有用的,我们不应该砍到它们,Trees are useful to us . We shouldnt _,_ _ .,链接,:,切断、中断,_,切碎、剁碎,_,剪掉、戒掉,_,cut,them down,cut off,cut up,cut out,短语之间,8.,Although,we have built “The Great Green,Wall”, we still need to work hard to protect,the environment.,点拨：,although,引导,状语从句，可以和,_,互换，,although,较正式，常放句首。,注意：,although,引导的从句不能与,but / however,一同连用，但常与,still / yet,连用。,练习：,( ),_ my grandpa is old , _ he looks,very strong and healthy.,A. Although ; and B. Although ; but,C. Although ; / D. Although ; or,C,让步,though,If you are the tree in great danger,what do you want to tell people,?,If you are the tree in great danger , what do you want to tell people ?,sand ,snd, n.,沙，沙子,sandstorm ,sndst:m, n.,沙尘暴,cut down,砍倒,change into,转换成，把,变成,desert ,dezt, n.,沙漠,desert ,dizt, v.,舍弃，遗弃,prevent ,privent, v.,防止，预防,prevent.from,妨碍，防止，预防,human being,人,although ,:lu, conj.,虽然，尽管,Words and expressions,What bad,weather,!,I could,nt,see,anything, and my face hurt while I was walking down the street just now.,But,what causes,these sandstorms?,As a result, a lot of rich land has,change,d,into,desert.,And a lot of water,can be saved,by forests.,Trees can also,stop,the wind,from,blowing the earth away.,Sentences,在,1a,中找到并划出下面的短语,1.,刮大风,2.,伴有很多沙尘,3.,走在路上,4.,刚才,5.,砍伐太多的树木,6.,造成沙尘暴,7.,结果,8.,大量富饶的土地,9.,变成沙漠,10.,阻止大风刮走泥土,11.,阻止流水冲走泥土,12.,对人类有害,13.,绿色长城,14.,需要努力工作,Trees are very useful to us. They can help us p_ the wind from blowing the earth away and stop the s_ from moving towards the rich land. Trees also s_ water from running away. They can keep a great d_ of water. So we must stop people from c_ down too many trees. Otherwise a lot of rich land will change into d_, l_ only sand. We must get rid of (,摆脱,) this kind of bad b_.,根据句意及首字母提示完成句子。,revent,and,ave,eal,utting,esert,eaving,ehavior,Goodbye!,
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