Unit 2 Saving the earth. Topic 2 All these problems are very serious. Section A 课件 19张PPT 无音视频

课件19张PPT。Section AUnit 2 Topic2All these problems are very seriousTask 1 Get ready for learning观看有关沙尘暴的视频
Learning Aims:
1.学习并掌握本课的新单词和短语； 2.初步感知不定代词的用法； 3.谈论树木的重要性，培养我们的环保意识。
Task2 Learn new words1.sand [s?nd] n. 沙
2.sandstorm [?s?ndst?:m] n. 沙暴
3.change into 转换成，变成（turn into)
4.desert [?dez?t] n. 沙漠 v. 舍弃，遗弃
5.human being 人
6.although [?:l?e?u] conj. 虽然，尽管，即使
7.reduce [r??dju:s] v. 减少，减轻
Task2 Ask and answer1. ________ [s?nd] n. 沙
2. sandstorm [?s?ndst?:m] n. ________
3.__________ 转换成，变成（turn into)
4. desert n. ______ v.___________
5. ___________ 人
6.__________ conj. 虽然，尽管，即使
7. reduce [r??dju:s] v.___________
sand沙暴change into沙漠舍弃，遗弃human being减少，减轻althoughmany trees cut down Task2 Use the new words 快速抢答，你准备好了吗？1. H_____________have cut down many trees.Human beingsforests gonewash the earth away2. The forests have gone and the rain washes the earth away.Task2 Use the new words快速抢答，你准备好了吗？3. A lot of rich land has ____________ desert because people have cut down too many trees. Task2 Use the new words 快速抢答，你准备好了吗？changed into快速抢答，你准备好了吗？Task2 Use the new words4. As a result, s_________ come into being.sandstormsTask3 Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm in groups.( )( )( )( )( )( )415362wash the earth awaymany treeschange into desertforests gonesandstorms come
into beingcut down trees Task5 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
Task 7Role-play
（熟读&角色扮演）
Task 8 Discuss and find the useful phrases and sentences.讨论分工及展示要求：
1.People have 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 the trees well.
_____________, animals will live a happy life in the forest.
as a result, change into, do something,
stop…from, blow…away has changed intoblows awaydo somethingstopfromAs a resultTask9 check in class Complete the sentences with the correct forms of the given phrases in the box. 直击中招1.（阜新）- ______ interesting book! Could you lend it to me?
- No problem.
A. What B. What a C. What an D. How
2. -Is there _____ important in today's newspaper?
-Nothing special.
A. everything B. nothing
C. something D.anything ExerciseCD直击中招3.We lost the basketball game, _____ everyone played well.
A. because B. although C. if D. so
4. -Wang Mei had an accident on the way to school. She fell off her bike and got badly hurt.
- _________.
A. That's nothing serious. B. It certainly was.
C. I'm sorry for it. D. I'm sorry to hear that.ExerciseBDWe learn: 1.Some words: 2.Some phrases: 3.Some sentences: We can: Summary What have we learned?sand, although change into, human being , stop sb./sth. from doing sth.(1)As a result, a lot of rich land has changed into desert.
(2)Trees can stop the wind from blowing the earth away. 1.Talk about the sandstorm and its harm.
2.Talk about the importance of trees.Homework Write a passage about how sandstorm
comes into being.
Thank you!