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课件网) Unit 2 Saving the Earth Topic 2 All these problems are very serious Section A Teaching aims 学习目标：1、熟记新单词，学会运用新短语； 2、学习不定代词和不定副词。 情感目标：了解沙尘暴的形成及其危害，认识树木的重要 性，提高环保意识。 教学重点：初步感知不定代词和不定副词的用法。 教学难点：能够根据图片和信息提示词描述沙尘暴形成的过程。 Puzzle Game （益智游戏) : (pair work) Find words as quickly as possible! 两人一组, 找出与环境有关的单词。 w a s h j c a k s e w i a f o r e s t k t e n f p r o t e c t r a d f e e a r t h t m t i e i m e a s e r f h b c w a t e r u e u e h t e f g I y l e l r e n v i r o n m e n t 提示：横6个，竖4个 Warming up w a s h j c a k s e w i a f o r e s t k t e n f p r o t e c t r a d f e e a r t h t m t i e i m e a s e r f h b c w a t e r u e u e h t e f g I y l e l r e n v i r o n m e n t A Puzzle Game : 提示：横6个，竖4个 wash forest protect earth water environment weather Watch the video, and answer: Which disaster can you see in the video Lead in Sandstorm. （沙尘暴） Do you know how sandstorms come into being sand + storm →sandstorm sand 风暴，暴风雨 n.沙 n.沙尘暴 Pre-listening many trees cut down Human beings have cut down many trees. forests gone wash the earth away 冲走 The forests have gone and the rain washes the earth away. change into desert 转换成，变成 沙漠 / dez (r)t / sandstorms As a result, sandstorms come into being. 3.Do you know how sandstorms come into being Number the pictures and talk about the sandstorm in groups. ( ) ( ) ( ) ( ) ( ) ( ) 4 1 5 3 6 wash the earth away many trees change into desert forests gone sandstorms come into being cut down trees Do you know what things can stop the sandstorm Trees. 2 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. √ While-listening Task 1 听第一遍时，关注对话的大致意思。 Task 2 Work alone Listen to 1a again and fill in the blanks. People have _____ too many trees. _____ a lot of rich land has _____ into desert. 2) Trees can _____the wind _____ the earth away. 3) They can also _____ the water _____ the earth away. 4) _____ we have built the “The Green Great Wall” , we still need to do something to protect the environment. cut down As a result changed stop from blowing stop from washing Although =though 三北防护林工程 Task 3 Watch the video 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. Tree’s functions 1.While I was walking down the street just now, I couldn’t see anything. 2.Although we have built “The Green Great Wall”, we still need to do something to protect the environment. Task 4 Read 1a again and find the sentences the indefinite pronoun and adverb somebod ... ...
