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1、,Unit 2 Saving the Earth,Topic2 All these problems are very serious.,Section A,城北学校,沙尘暴,pollution,预习导纲,读1a，在文中划出下列短语并大声朗读。1、结果_ 2、砍倒_3、变成沙漠_ 4、阻止某人做某事_5、人/人类_ 6、对有害_7、吹走_ 8、冲走_9、沿大街走_ 10、大量肥沃的土地_,二、读下列句子，翻译并探究。1.Trees can also stop the wind from blowing the earth away.译：_ They can also stop the wate
2、r from washing the earth away.译：_探究：两句均使用了stop sb.(sth.)from doing sth.意思为_.此句型可用_来替换。在口语中，from 可省去。同类句型还有_、_.但from不能省略。练一练：Its too cold today.Remember to wear a mask(面罩)to _ you from catching a cold.Ok，I will.A.prevent B.encourage C.provide D.destroy,2.Cutting down trees is harmful to human beings,
3、animals and plants.译_探究：cutting down trees是_词短语在句子中作_语，谓 语用_数。练一练：1)散步是我的爱好。my hobby.2)阅读使人完美。a man.,3.Although we have built“The Great Green Wall”,we still need to do something to protect the environment.译_探究：although 是 词，有“虽然，尽管”和“不过，然而”两层意思，引导 状语从句，可以和 互换，although 较正式，更为口语化，使用更普遍些。注意：although 引导的
4、从句不能与but,however同时连用，但常与yet,still 连用。练一练：虽然他老了，但是他仍然继续努力工作。_ he_ old,he still_ working hard.,many trees,cut down,forests gone,wash the earth away,冲走,change into desert,转换成，变成,沙漠,e.g.A lot of rich land has changed into desert because people have cut down too many trees.,sandstorms,come into being,n.沙
5、尘暴,The boy and girls are talking about.different types of sandstorms the reasons for sandstorms sandstorms in different cities,1b Listen to 1a and choose the best answer.,Focus on the main idea of the conversation when you listen for the first time.,Listen and answer the questions,1.Whats the weathe
6、r like today?Its bad.The wind is so strong.And the sand really hurts face.2.What causes these sandstorms?People have cut down too many trees.As a result,a lot of rich land has changed into desert.3.Do we still need to do something to protect the environment?Yes,we do.Although we have built“The Green
7、 Great Wall”,we still need to do something to protect the environment.,conj.虽然，尽管，即使,n.沙,somebody,someone,something,somewhere anybody,anyone,anything,anywhere none,nobody,nothing,nowhere everybody,everyone,everything,everywhere,一般情况下用于肯定句,一般情况下用于否定句和疑问句,表否定含义,可用于各种句式,the indefinite pronoun and adver
8、b,1.I have _ to tell you.A.important somethingB.something important,B,形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后,Do you know?,2.Everybody _ ready for the match.A.is B.are,A,不定代词作主语时，谓语动词要用单数。,直击中考,1.At present,children mean _ to most parents in China.A.everything B.nothing C.angthing D.something(河南.14)2.He thin
9、ks himself somebody,but we think him _.A.nobody B.anybody C.somebody D.everybody(河南.13)3.The exam is 3 days away.Make sure youve got _ ready.A.something B.anything C.everything D.nothing4.Turn off the TV.Theres _ on it.OK.Lets listen to music for a moment instead.A.something new B.nothing new C.new
10、something D.new nothing,A,A,C,B,1a Listen,look and say.,1c Read 1a and complete trees functions.,Trees can stop the wind from blowing the earth away.A lot of water can be saved by forests.They can also stop the water from washing the earth away.,Trees functions,K:wind;sand;anything M:sandstorms J:cu
11、t down;as a result;change into M:affect J:stopfrom;blow away K:can be saved J:wash away K:is harmful to;although;do something,Act out the dialog in pairs,2 Complete the sentences with the correct forms of the given phrases in the box.,as a result,change into,do something,stopfrom,blowaway,1.People h
12、ave cut down such a large number of trees that the land _desert.2.There are fewer trees left,so the wind always _ the earth _.3.Air pollution has become a serious problem,so we must _ to reduce it.4.we should try our best to _ people _ cutting down the trees.5.In the future,human beings can protect
13、the trees well._,animals will live a happy life in the forest.,has changed into,blows,away,do something,stop,from,As a result,3 Do you know how sandstorms come into being?Number the pictures and talk about the sandstorm in groups.,(),(),(),(),(),(),4,1,5,3,6,2,wash the earth away,many trees,change i
14、nto desert,forests gone,sandstorms come into being,cut down trees,4 A.Listen to the passage and circle the phrases you hear.,become weakerdestroy the environmentdisappear rapidlyon the earthenough bamboo to eat,4 B.Listen again and fill in the blanks.,1.Now some kinds of animals are becoming _ _ _.2
15、.Some animals are_ _ _dying out completely.3.In the past,pandas lived a quiet life and had _ _food.4.Humans have _ _ _ the importance of protecting animals.5.We should _ _ _to protect them.,do our best,in danger of,plenty of,come to understand,fewer and fewer,Lily,would you like _ to drink?Cindy is
16、very busy now.She needs _ to help her.Is there _ wrong with your computer?Jim looked for his pencil-box _,but he didnt find it.I stayed at home last week.I didnt go _.,Use someone,something,anything,somewhere,anywhere to fill in the blanks.,something,someone,anything,somewhere,anywhere,Exercises,选词填
17、空,As time goes by,man is making the earth sick.Its very important_ with the rubbish in cities.This is because rubbish _ pollutes the environment but also does harm to our health.We are _ to find some ways to do with the rubbish.For example,we can_the rubbish and then sort them.We can still _ waste p
18、aper,old bottles and glass.Water pollution,of course,is a big problem in the world,so we must stop the factories _ pouring waste water into rivers.Now the temperature of the earth is _,and she is calling for(要求)help.Our country _ some laws to protect the environment.As a student,we shouldnt litter _
19、or spit in public.We must try our best _ the environment.Because we have only one earth.,to deal,not only,trying,collect,recycle,from,rising,has passed,anything,to protect,We learn:1.Some words:sand,although 2.Some phrases:change into,human being 3.Some sentences:(1)As a result,a lot of rich land ha
20、s changed into desert.(2)Trees can stop the wind from blowing the earth away.We can:1.Use the indefinite pronoun and adverb.2.Talk about the sandstorm and its harm.,Summary,Assignment,Read 1a.Memorize the useful expressions and key sentences which we learn today.Finish Section A in your workbook.Preview Section B.,Thank you,
