Unit 2 Saving the Earth Topic 2 Section A 课件 2025-2026学年仁爱科普版（2012）九年级英语上册

Unit 2 Saving the Earth Topic 2 Pollution has caused too many problems. Section A Language goals By the end of the class, you will be able to 1.Master the following words ,phrases and sentences: Words： sand, although Phrases: change into, human being Sentences：①As a result, a lot of rich land has changed into desert. ②Trees can stop the wind from blowing the earth away. 2. Know how sandstorms come into being. 3. Be able to use the indefinite pronouns correctly. Revision：一般过去时和现在完成时的用法区别 一般过去时 现在完成时 用法 连用的词和短语 表示过去发生或已完成的动作 对现在的影响或产生的结果（与现在无关） 表示过去发生的动作或存在的状态（与现在无关） yesterday, last + 时间名词, 时间段+ ago, in 2005, in the past, just now … for +时间段, since, recently,so far, already, yet, just, ever, never, before in the past +时间段, Look and say 4. As a result, sandstorm come into being. come into being 形成产生 Work on 3 wash the earth away many trees change into desert forests gone sandstorms come into being cut down trees Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm in 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 Long ago, there were lots of trees and forests. But human beings needed some wood to build houses and do other things, so they cut down the trees day by day. The forests have gone. The rain washed the earth away.A lot of rich land has changed into desert. As a result, the sandstorms come into being. Listen to 1a and choose the best answer. The boy and girls are talking about . different types of sandstorms the reasons for sandstorms sandstorms in different cities Focus on the main idea of the conversation when you listen for the first time. Read 1a and complete trees’ functions. Tree’s functions ________________________________ A lot of water can be saved by forests. ________________________________ Trees can stop the wind from blowing the earth away. They can also stop the water from washing the earth away. 1. The boy and girls are talking about ___________. different types of sandstorms the reasons for sandstorms sandstorms in different cities 2.What’s the weather like today ? 3.What causes these sandstorms ? 4.Do we still need to do something to protect the environment ? choose the best answer. B It’s bad. The wind is so strong . And the sand really hurts face. People have cut down too many trees.As a result, a lot of rich land has changed into desert. Yes, we do. Although we have built “The Green Great Wall”, we still need to do something to protect the environment . 1. As a result, a lot of rich land has changed into desert. change into 意为“转换成、变成” 考点 毛毛虫长大后会变成美丽的蝴蝶。 ______________________________________________________________________________. 翻译 Caterpillars will change into beautiful butterflies when they grow up. (Kangkang, Maria and Jane are talking in a room.The wind outside is blowing strongly.) Maria: What a strong wind! Kangkang: Yes. But it's better than the last few years.There were sandstorms before.While I was walking down the street,I couldn't see anything.The sand really hurt my face. Maria: Why was the weather so bad? Jane: People cut down too many trees. As a result, a lot of rich land changed into desert. Trees can stop the wind from blowing the earth away. It’s a desert. n. 沙漠 People deserted the houses. v.废弃，遗弃 → We can change grapes into the wine. A lot of rich land has changed into desert. → 转换成，变成 Presentation Listen to 1a and choose the best answer. The boy and girls are talking about ______ . A. different types of sandstorms B. the reasons for sandstorms C. sandstorms in different cities B Kangkang: And a lot of water can be saved by forests. Jane: Trees can also stop the water from washing the earth away. Maria: Cutting down trees affects the weather so much. Kangkang: Yes.It is harmful to human beings, animals and plants. Although there were sandstorms before, now we have built "The Green Great Wall".Our environment has become much better. Read 1a and complete trees’ functions Trees can stop the wind from blowing the earth away. Trees can also stop the water from washing the earth away. 前几年 沿着街道走 砍伐 结果 阻止...干某事 冲走 刮走 对...有害 Read the passage and find the useful phrases. the last few years walk along the street cut down as a result stop/ prevent/ keep...from doing sth. wash...away blow...away be harmful to...=do harm to... the last few years as a result blow...away wash...away cut down be harmful to=do harm to stop/prevent/keep...from doing sth walk along the street Activity 2: 单词闪现，快读快译。 单词闪现，快读快译。 Consolidation ●Listen and repeat ●Work in groups and read 1a in roles. Role-play Role-play the conversation. Although there were sandstorms before, now we have built “The Great Wall”. 虽然之前有沙尘暴，但现在我们已经建起了“绿色长城”， although conj. 虽然，尽管，引导让步状语从句，相当于 though, 只是 although 比 though 更为正式。 eg: Though/Although it was raining, we went there. 虽然下着雨，但我们还是去了那儿。 earth 着重指与天空相对的“土地”，还泛指泥土；soil 主要指用于种植庄稼的“土壤”；ground 主要指大地表面；land 着重指与河、湖、海洋相对应的陆地。 eg: Put the tree in the hole and fill it with earth again. 把树放进坑里，然后用土壤重新把坑填满。 Fish cannot live on land. 鱼不能在陆地上生活。 The little boy was lying on the ground。 小男孩正躺在地上。 Listen to the tape and number the pictures. D E C B A Participatory Learning Read the tape and finish the thinking map. Trees can stop the wind from blowing the earth away. stop the water from washing the earth away. save a lot of water 注意： 在句中使用 although 或 though 时,不能与but同时使用, 但although/though 后可用yet或still等。加强语气时，通常说even though，而不能说even although。 eg: Although the question is difficult, he can still answer it. 尽管这个问题很难，他仍然能回答。 Retell the trees` functions to your partner according to the thinking map. You can do it like this: Trees can stop.... Trees also can save.... What`s more, trees can prevent.... Read the tape again and answer the following questions. 1. What was the weather like before? 2.Why was the weather so bad? 3. How does cutting down trees do harm to us? 4.How is the situation now? There were sandstorms. When people were waking along the street, they couldn`t see anything. People cut down too many trees. As a result, a lot of rich land changed into desert. It can affect the weather and is harmful to human beings,animals and plants. We have built “The Green Great Wall”.Our environment has become much better. Unit 2 Topic 2 Section A 重点单词短语句型： although; change…into…; stop sb./sth. (from) doing sth. What引导的感叹句： ①What+形容词+不可数名词/可数名词复数！ ②What+ a/an+形容词+可数名词单数！ 进一步了解有关环境污染的一些情况，提高环境保护意识 根据情景提示，用恰当的短语或句子填空。 1.你想说“真不好的天气”，你可以这么说:　　　　　　　　　　　　 it is! 2.你想说树木能防风固沙，你可以这样说： 　　　　　 . 3.你想说“尽管太阳高照，却不很暖和”，你可以说： 　　　　　　　　　　　　 , it isn't very warm. What bad/terrible weather Trees can stop the wind from blowing the earth away Although the sun is shining null 61308.188 67551.43 Lavf58.20.100 77064.0 $