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1、Unit2Topic1SectionApUnit2Topic1SectionApptgongkaikeptgongkaike3Doyouknowhowsandstormscomeintobeing?Numberthepicturesandtalkaboutthesandstormingroups.()()()()()()()()()()()()415362wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down trees1.There were many tree
2、s in the past./There used to be many trees.2.People have cut down too many trees.3.The forests have gone. 4.The water washes the earth away. The wind blows the earth away.5. A lot of rich land has changed into desert.6.The sandstorms come into being. Do you know what causes the sandstorms?Do you kno
3、w Whats the uses of the tree?Discuss in groups and tell me the answers.Trees can stop the wind from blowing the earth away.Trees can stop the water from washing the earth away.A lot of water can be saved by forests.Theboyandgirlsaretalkingabout.A.differenttypesofsandstormsB.thereasonsforsandstormsC.
4、sandstormsindifferentcities1b Listen to 1a and choose the best answer.Focusonthemainideaoftheconversationwhenyoulistenforthefirsttime.Listen again and fill in the blanks.1.People _too many trees.2.As a result, a lot of rich land _ _ _desert.3.Trees can stop the wind from_ the earth _.4.Trees can als
5、o stop the water from_ the earth _.5.Cutting down trees _ _ _ human beings, animals and plants.have cut downhas changed intoblowingawaywashingawayis harmful to1cRead1aandcompletetreesfunctions. A.Treescanstopthewindfromblowingtheearthaway.B.Alotofwatercanbesavedbyforests.C.Theycanalsostopthewaterfro
6、mwashingtheearthaway.Trees functions Exercise 1.We lost the game,_everyone played well.A.because B.Although C.if2.Water will _ice when the temperature is below 0.A.change into B. put into C come into3.The strong wind _ my clothes _yesterday.A washed way B.blew away C cut down4.We must _people _cutti
7、ng trees.A. stop .from B keep ./ C.Both A and B5.Light pollution _birds.A. do harm toB. is harmful to C.does harmful toWe 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 has changed into desert. (2)Trees can stop the w
8、ind from blowing the earth away.We can: Talk about the sandstorm and its harm.Summary2Completethesentenceswiththecorrectformsofthegivenphrasesinthebox. 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 fe
9、wer 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 the trees well. _, animals will live a happy life in the forest. has cha
10、nged intoblows awaydo somethingstopfromAs a result1.Read1a.2.Writeacompositionabouthowsandstormscomeintobeing.3.PreviewSectionB.Thankyou!2Completethesentenceswiththecorrectformsofthegivenphrasesinthebox. as a result, change into, do something, stopfrom, blowaway 1.People have cut down such a large n
11、umber 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 the trees well. _, animals will live a happy life in the forest. has changed intoblows awaydo somethingstopfromAs a result结束语结束语谢谢大家聆听！谢谢大家聆听！15
