人教版九年级Unit 13 We're trying to save the earth!-Section A 3a—3b-ppt课件-(含教案+音频)-公开课-(编号：e22e6).zip

1、Unit13 we are trying to save our earth Section A(3a3b)教学设计教学设计 一、教学目标一、教学目标 1. 语言知识目标 基本词汇：litter, advantage, bottom, fisherman, coal, ugly, cost, wooden, plastic, takeaway, bin, shark, fin, method, cruel. Harmful, chain, ecosystem, industry, law, scientific, afford, reusable, transportation, recycl

2、e, napkin, upside, gate, bottle, president, inspiration, iron, work, metal, creativity, 基本词组：be harmful to, at the top(of sth.), take part in, turn off, take action, throw away, put sth. to good use, pull down, bring back 基本句型：Were trying to save the earth! The river used to be so clean. The air is

3、badly polluted. No scientific studies have showed that shark fins are good for health. We should help save the sharks. 2. 技能目标: 能正确运用现在进行时，现在完成时，被动语态，情态动词和 used to 句型。 3. 情感目标: 有环境危机意识，学会关注环境保护环境。二、教学重难点： 二、教学重点二、教学重点 （1）能正确运用现在进行时，现在完成时，被动语态，情态动词和 used to 句型。 （2）保护环境的措施方法。 三、教学难点三、教学难点 能正确运用现在进行时，现

4、在完成时，被动语态，情态动词和 used to 句型。 四、教学过程四、教学过程 I. Revision (1) Role-play 2d. (2) Review the words and phrases. II. Lead in (1) Teacher tells students the earth is badly polluted. Look at the pictures and say out what happened. so what should we do to save the earth? Lets take action. For example: Air poll

5、ution 1. Factories pour dangerous gases into the air. Factories produce too much dangerous smoke. 2. Cars also pour dangerous gases into the air. The traffic produces too many fumes. 3. Some people smoke in public places Natural resources Natural resources are disappearing at a dangerous rate. Water

6、 pollution The water is very dirty. Fish died. (2) We are harming our planet in so many ways. What should we do? close down the factories; help to clean up the river; take the bus or subway; ride a bike; bring a bag to go shopping throw rubbish in the cans; turn off the lights when you leave a room;

7、 use paper or resusable bags; recycle books and paper; turn off the shower when you wash your hair; dont use napkins; rethink, reuse, recycle . . (3)There are some animals are endangered. We should do something to protect the animals and the environment! III. Discussion (1) Have you ever seen a shar

8、k? (2) What do you know about sharks? IV. Reading (1)Sharks are endangered, read the passage and judge the sentences. Sharks fin（鱼鳍）soup is famous and expensive all around the world. We have to kill a whole shark to get a bowl of sharks fin soup. People cut off sharks fins and throw the sharks back

9、into the ocean. Sharks are in the bottom of the food chain in the oceans ecosystem. WildAid and the WWF are environmental protection groups in China. Sharks fin s are good for health. (2)Complete the fact sheet in 3a. Where shark fin soup is popular Number of sharks caught and traded every year How

10、much the numbers of some kinds of sharks have fallen in the last 20 to 30 years Two environmental groups which are against “finning” V. Language points 1. harmful 形容词，意为“有害的” 。常构成短语 be harmful to “对有害的” 。 Staying up often is harmful to your health. 经常熬夜对你的健康有害。 【拓展】 harm 名词，意为“害处” 。常用构成短语 do harm to

11、 “对有害” ，相当于 be harmful to. Too much smoking does harm to his health. = Too much smoking is harmful to his health. 吸烟 过多对他的健康有害。 即时即练 改为同义句。 Reading in the sun does harm to our eyes. Reading in the sun _ _ _ our eyes。 2. 辨析：join, join in 和 take part in join 加入组织，团体，党派等，有作为其中的一个成员的含义;后面也可以加表示人 的名词，表示和

12、某人一起参加某活动 join in 加入一种具体活动。 take part in 指参加会议或群众性活动等，着重说明句子主语参加该项活动并在活动中发挥 作用 即学即用 1. Have you _ a club? Yes, Im in a swimming club and I often _ the swimming training. A. joined; take part in B. joined; join C. taken part in; join D. taken part in; join in 2. Were going for a picnic. Would you lik

13、e to_ us? Why not? Lets go! A. attend B. join C. join inD. take part in 3. afford afford 是动词，意为“买得起,担负得起” ，通常与 can, could, be able to 连用,多用于否定 句中。 They couldnt afford $50 for a ticket. 他们拿不出 50 美元买一张票。 afford 后面常跟带 to 的动词不定式。 We cant afford to go abroad this summer. 今年夏天我们没有足够的钱出国。 例句：Miss Taylor ne

14、ver wastes money on anything too expensive, even though she can _to. She has donated much of the money she saved to charities. A. afford B. allow C. remind D. pay VI. Practice Read the passage and fill in the blanks. Some people like to eat sharks fin soup, especially in _China. But getting the shar

15、ks fin is very _. When people catch sharks,they _ _their fins and throw the sharks into the ocean. The shark slowly dies because it cant _ without the fin. And it is also _ to environment. Sharks are at the _ of the food chain. If the number of sharks drops too low, it will break the balance of natu

16、re. Please say no to eating the shark fin soup, and take action to save the sharks! Read the passage and dill in the blanks with the words in the box. so although if but when 1. Many people do not realize they are killing a whole shark _they enjoy a bowl of sharks fin soup. 2. Sharks are at the top

17、of the food chain, _ if their numbersdrop, the oceans ecosystem will be in danger. 3. Many think that sharks are too strong to be endangered, _ they are wrong. 4. _there are no scientific studies to support this, a lot of people believe that shark fins are good for health. 5. Sharks may disappear on

18、e day _ we do not do something to stop the sale of shark fins. Lets do more exercises. I.用方框中词的适当形式完成下面的句子。 (1) I think its _ to make such a young boy work all day. (2)The poor fisherman cant _ his childrens education. (3) I think the government must develop _ to protect environment. (4) Eating too

19、much junk food is _ to your health. (5) He can use different _ to work out the problem. II. 单项选择。 1. Are you going to _ any of the events? Yes. Maybe long jump and high jump. A. take part in B. join C. attend D. join in 2. I cant afford _ him an expensive birthday present. A. to buyB. buying C. for

20、buyingD. buy 3. Remember to _ the lights when you leave the room. OK. I will. A. turn onB. turn down C. turn upD. turn off 4. The girl always has some money to _ snacks. A. spendB. pay for C. takeD. cost 5. Look! _ boys are playing on the playground. Yes. _ them is about 200. A. A number of; The num

21、ber of B. The number of; The number of C. The number of; a number of D. A number of; A number of III.根据汉语提示完成句子。 1. 我们必须采取行动来阻止他们。 We must _ _ to stop them. 2. 我从没听说过这个人。 I have never _ _ such a man. 3. 我们乐意尽力帮你摆脱困境。 We are glad to do what we can do _ _ _. 4. 到目前为止，我已经交了二十个朋友。 _ _, I have made twent

22、y friends. 5. 实际上，她从没去过那儿。 _ _, she has never been there. 五、五、Homework 1.Review the new words and expressions. 2. Practice the passage in 3a. 3.Write an eassy about our environment. Unit 13 We are trying to save the earth. Factories pour dangerous gases into the air. Factories produce too much dange

23、rous smoke. Cars also pour dangerous gases into the air. The traffic produces too many fumes. Some people smoke in public places. Air pollution Natural resources are disappearing at a dangerous rate. 以危险的速以危险的速 度度 Natural resources desert serious pollution We are harming our planet in so many ways.

24、伤害伤害 air pollution soil pollution water pollution close down the factories; help to clean up the river; take the bus or subway; ride a bike; bring a bag to go shopping,throw rubbish in the cans; turn off the lights when you leave a room; use paper or resusable bags; recycle books and paper; turn off

25、 the shower when you wash your hair; dont use napkins; rethink,reuse, recycle . . 鲨鱼Shark 鲨鱼，生活在海洋中，是海洋中最凶猛的 鱼类。 鲨鱼早在恐龙出现前三亿年前就已经存在 地球上，至今已超过五亿年，它们在近一 亿年来几乎没有改变。鲨鱼，在古代叫作 鲛、鲛鲨、沙鱼，是海洋中的庞然大物， 所以号称“海中狼”。还有鲸鲨，大白鲨。目 前因为有大多数人认为鲨鱼的软骨（即鱼 翅）中蛋白质很高，但这是错误的。鸡蛋 的蛋白质远远超过鱼翅。因为人类错误的 观念，鲨鱼几十年来被大量猎杀，专家分 析再这样下去，鲨鱼将绝种，请

26、保护好鲨 鱼。吃鱼翅是可以的，但也对人体有害， 因为鲨鱼翅中含有一定量的神经毒素。 Read the passage about sharks and complete the fact sheet below. 3a3a Where shark fin soup is popular Number of sharks caught and traded every year how much the numbers of some kinds of sharks have fallen in the last 20-30 years Two environmental groups agai

27、nst finning 70 million over 90 percent WildAid and the WWF Lets learn some language points harmful 形容词，意为形容词，意为“有害的有害的”。常构成短语。常构成短语 be harmful to “对对有害的有害的”。 Staying up often is harmful to your health. 经常经常 熬夜对你的健康有害。熬夜对你的健康有害。 【拓展拓展】 harm 名词，意为名词，意为“害处害处”。常用构成短语。常用构成短语 do harm to “对对有害有害”，相当于，相当于be

28、 harmful to. Too much smoking does harm to his health. = Too much smoking is harmful to his health. 吸烟吸烟 过多对他的健康有害。过多对他的健康有害。 改为同义句。改为同义句。 Reading in the sun does harm to our eyes. Reading in the sun _ _ _ our eyes. is harmful to 辨析：辨析：join, join in 和和take part in to join 加入组织，团体，党派等加入组织，团体，党派等 ，有作为

29、其中的一个成员的含，有作为其中的一个成员的含 义义; 后面也可以加表示人的名后面也可以加表示人的名 词，表示和某人一起参加某词，表示和某人一起参加某活活 动动 join in 加入一种具体加入一种具体活动活动 take aprt in 指参加会议或群众性活动指参加会议或群众性活动 等，着重说明句子主语参加该等，着重说明句子主语参加该 项活动并在活动中发挥项活动并在活动中发挥作用作用 1. Have you _ a club? Yes, Im in a swimming club and I often _ the swimming training. A. joined; take part

30、in B. joined; join C. taken part in; join D. taken part in; join in 2. Were going for a picnic. Would you like to_ us? Why not? Lets go! A. attend B. join C. join inD. take part in afford是动词，是动词，意为意为“买得起买得起,担负得起担负得起”，通常通常 与与can, could, be able to连用连用,多多用于否定句中。用于否定句中。 They couldnt afford $50 for a ti

31、cket. 他们拿不他们拿不 出出50美元买一张票。美元买一张票。 afford后面常跟带后面常跟带to的动词不定式。的动词不定式。 We cant afford to go abroad this summer. 今年今年 夏天我们没有足够的钱出国。夏天我们没有足够的钱出国。 Miss Taylor never wastes money on anything too expensive, even though she can _to. She has donated much of the money she saved to charities. A. affordB. allow C

32、. remind D. pay Lets do this to review the text ! Some people like to eat sharks fin soup, especially in _China. But getting the s harks fin is very _. When people catch sharks, they _ _their fins and throw the sharks into the ocean. The shark slowly dies because it cant _ without the fin. And it is

33、 also _ to environment. Sharks are at the _ of the food chain. If the number of sharks drops too low, it will break the balance of nuture. Please say no to eating the shark fin soup, and take action to save the sharks! southern cruel cut off swim harmful top 1. Many people do not realize they are ki

34、lling a whole shark _they enjoy a bowl of sharks fin soup. 2. Sharks are at the top of the food chain, _ if their numbersdrop, the oceans ecosystem will be in danger. Read the passage again and fill in the blanks with the words in the box. so when 3b3b so although if but when 3.Many think that shark

35、s are too strong to be endangered, _ they are wrong. 4._there are no scientific studies to support this, a lot of people believe that shark fins are good for health. 5. Sharks may disappear one day _ we do not do something to stop the sale of shark fins. but Although If 练习题练习题 I. 用方框中词的适当形式完成下面的句子。用

36、方框中词的适当形式完成下面的句子。 (1) I think its _ to make such a young boy work all day. (2)The poor fisherman cant _ his childrens education. (3) I think the government must develop _ to protect environment. (4) Eating too much junk food is _ to your health. (5) He can use different _ to work out the problem. me

37、thod, cruel, harmful, afford, law cruel afford law harmful method II. 单项选择。单项选择。 1. Are you going to _ any of the events? Yes. Maybe long jump and high jump. A. take part inB. join C. attend D. join in 2. I cant afford _ him an expensive birthday present. A. to buyB. buying C. for buyingD. buy 3. Re

38、member to _ the lights when you leave the room. OK. I will. A. turn onB. turn down C. turn upD. turn off 4. The girl always has some money to _ snacks. A. spendB. pay for C. takeD. cost 5. Look! _ boys are playing on the playground. Yes. _ them is about 200. A. A number of; The number of B. The numb

39、er of; The number of C. The number of; a number of D. A number of; A number of III. 根据汉语提示完成句子。根据汉语提示完成句子。 1. 我们必须采取行动来阻止他们。我们必须采取行动来阻止他们。 We must _ _ to stop them. 2. 我从没听说过这个人。我从没听说过这个人。 I have never _ _ such a man. 3. 我们乐意尽力帮你摆脱困境。我们乐意尽力帮你摆脱困境。 We are glad to do what we can do _ _ _. 4. 到目前为止，我已经

40、交了二十个朋友。到目前为止，我已经交了二十个朋友。 _ _, I have made twenty friends. 5. 实际上，她从没去过那儿。实际上，她从没去过那儿。 _ _, she has never been there. In fact take action heard of to help out So far Homework 1.Review the new words and expressions. 2.Practice the passage in 3a. 3.Write an eassy about our environment. the earth song by Michael Jackson !