1、Unit13 we are trying to save our earth SectionA(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, recycle
2、, 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 b
3、adly 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，现在
4、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 pollu
5、tion 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 shark
8、? (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 i
9、nto 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 m
10、uch 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，表示和某人
12、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 like t
13、o_ us? Why not? Lets go! A. attend B. joinC. 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 never
14、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. remindD. 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 sharks fi
15、n 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 nature. P
16、lease 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. soalthough ifbutwhen 1. Many people do not realize they are killing a whole shark _they enjoy a bowl ofsharks fin soup. 2. Sharks are at the top of the fo
17、od chain,_ if their numbersdrop, the oceans ecosystem will be in danger. 3. Many think that sharks are too strong to beendangered, _ 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
18、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 much junk f
19、ood 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 inB. join C. attendD. join in 2. I cant afford _ him an expensive birthday present. A. to buyB. buying C. for buyingD. buy
20、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 theplayground. Yes. _ them is about 200. A.Anumber of; The number of B. The num
21、ber of; The number of C. The number of; a number of D.Anumber 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 twenty 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.
