Unit2Topic1SectionA-副本.ppt

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1、Unit 2 Saving the EarthTopic2 All these problems are very serious.Section ASection A1.What 1.What causes these causes these sandstorms?sandstorms?Individual workIndividual workPeople have cut down too many trees.As a result,a lot of rich land has changed into desert.1.What causes these sandstorms?1.

2、What causes these sandstorms?Individual workIndividual workGroup workGroup work2.What are the trees functions?2.What are the trees functions?3.Have you found any difficult 3.Have you found any difficult phrases and sentences?phrases and sentences?4.What can we do to protect 4.What can we do to prote

3、ct the environment?the environment?A.Trees can stop the wind from blowing the earth away.B.A lot of water can be saved by forests.C.They can also stop the water from washing the earth away.Trees functions Trees can stop the wind from blowing the earth away.树树木可以阻止木可以阻止风风将土壤吹走。将土壤吹走。stopfrom 阻止。做阻止。做

4、blowaway 吹走吹走A lot of water can be saved by forests.森林可以储存大量的水。Can be saved 是含有情态动词的被是含有情态动词的被动语态。动语态。They can also stop the water from washing the earth away.树木还能够防止土壤被水流带走。Wash away冲走。冲走。Although we have built“The Green Great Wall”,we still need to do something to protect the environment.Although

5、虽虽然，尽管，即使然，尽管，即使Eg.What else can we do What else can we do to to protect our protect our environment?environment?Lets be greener Lets be greener people!people!1.Some words:sand,although 2.Some phrases:change into,human being 3.Some sentences:(1)As a result,a lot of rich land has change into desert.(

6、2)Trees can stop the wind from blowing the earth away.Summary2 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 have cut down such a large number of trees that the land _desert.2.There are fewer trees left,s

7、o 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 the trees well._,animals will live a happy life in the forest.has changed intoblows awaydo som

8、ethingstopfromAs a result1.Read 1a.2.Memorize the useful expressions and key sentences which we learn today.3.Finish Section A in your workbook.4.Preview Section B.Thank you!Thank you!3 Number the pictures and talk about the sandstorm in groups.()()()()()()()()()()()()415362wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down treeswash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down trees