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1、All these problems are very serious.,Section A,Unit2 Topic2,Watch a short movie and guess.,What kind of weather is it?,Sandstorm,rainstorm,snowstorm,a kind of storm caused by sand,Describe the sandstorms,3 Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm i
2、n groups.,( ),( ),( ),( ),( ),( ),4,1,5,3,6,2,wash the earth away,many trees,change into desert,forests gone,sandstorms come into being,cut down trees,many trees,cut down,forests gone,wash the earth away,冲走,change into desert,sandstorm,come into being,Compare the two pictures.,The rich land has chan
3、ged into desert.,change into, change into,Retell Competition,List the trees functions,let out oxygen, lungs of the earth, control the climate , provide homes for animals, give us fruit, medicine, wood, rubber etc.,One Jungle, Many Worlds.,Skim 1a and find more about Trees functions.,Trees can stop t
4、he 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.,Listen to 1a, and answer the questions.,The Green Great Wall.,1. What are the boy and girls talking about?,2. What have we done to protect the environment?,The reaso
5、ns for sandstorms.,Read aloud and pick up the useful expressions.,Useful Expressions,change into stop from blow away wash away human being as a result,Useful Expressions,7. blow strongly 8. What bad weather! 9. affect the weather 10. The Green Great Wall,1.I have _ to tell you. A. important somethin
6、g B. 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。,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 have cut do
7、wn 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 the
8、 trees well. _, animals will live a happy life in the forest.,has changed into,blows,away,do something,stop,from,As a result,K: wind; sand; anything M: sandstorms J: cut 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 someth
9、ing,Act out the dialog in pairs,沙尘暴是怎么形成的？ How do sandstorms _? 2. 他忘了浇花，结果花都死了。 He _ water the flowers. _, they all died. 3.虽然沙滩上的太阳很大，但孩子们仍开心地在玩着沙子。 _ the sun is shining strongly on the beach, the children are still playing with the _ happily.,链接中考,Summary,1.change into desert 2. human being 3.as
10、a result 4. come into being 5.stop from 6.blow away 7.wash away 8.destroy the environment (1)Trees can stop the wind from blowing the earth away. (2)They can stop the water from washing the earth away. (3)As a result, a lot of rich land has changed into desert. (4)While I was walking down the street
11、 just now, I couldnt see anything. (5)Although we have built “The Green Great Wall”, we still need to do something to protect the environment.,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!,
12、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 cha
13、nge 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,4 A. Listen to the passage and circle the phrases you hear.,become weaker destroy the environment disappear rapidly on the earth enough bamboo to eat,4 B. Listen aga
14、in and fill in the blanks.,1. Now some kinds of animals are becoming _ _ _. 2. 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,