unit13We are trying to save the earth SectionA 3a-3b 第二课时ppt

1、.Unit 13We are trying to save the earth. Read the passage about sharks and complete the fact sheet below.3a3a.Many have heard of sharks fin soup. Thisfamous and expensive dish is especiallypopular in southern China. But do you realizethat youre killing a whole shark each timeyou enjoy a bowl of shar

2、ks fin soup?When people catch sharks, they cut off theirfins and throw the shark back into the ocean. This is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the oceans ecosystem. If their numb

3、ers drop too low, it will bring danger to all ocean life. Many believe that sharks can never be endangered because they are the strongest in their food chain. .But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by

4、over 90 percent in the last 20 to 30 years. Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop laws to stop the sale of sharks fins. So far, no scientific studies have shown that sharks f

5、ins are good for health, so why eat them? Help save the sharks!.Where shark fin soup is popularNumber of sharks caught and traded every yearhow much the numbers of some kinds of sharks have fallen in the last 20-30 yearsTwo environmental groups against finningsouthern China 70 millionover 90 percent

6、WildAid and the WWF.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 i

7、t 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 nuture. Please say no to eating the shark fin soup, and take action to save the sharks! southern cruel cut off swim harmful top.Lets learn somelanguage points.harmfu

8、l 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 harmful to. Too much smoking does harm to his health. = Too much smoking is harmful to his health. 吸烟吸

9、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 tojoin加入组织，团体，党派等，有加入组织，团体，党派等，有作为其中的一个成员的含义作为其中的一个成员的含义;后面也可以加表示人的名词，后面也可以加表示人的名词，表示和某人一起参加某活动表示和某人一起参加某活动join in 加入一种具体活动。加入一种具体活动。take ap

10、rt in指参加会议或群众性活动等，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着重说明句子主语参加该项活动并在活动中发挥作用。动并在活动中发挥作用。.Will you join us in the discussion? 你参加我们的讨论吗？你参加我们的讨论吗？ She joined the Young Pioneers. 她加入了少先队。她加入了少先队。 Why didnt you join in the talk last night? 昨晚你为什么没参加座谈？昨晚你为什么没参加座谈？Did you take part in the sports meet? 你参加运动会了吗？你

11、参加运动会了吗？.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 to_ us? Why not? Lets go! A. attend B. join C. join inD. take part in . a

12、fford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 ticket. 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。例句：例句：Miss Taylor never wastes money on anything

13、 too expensive, even though she can _to. She has donated much of the money she saved to charities. A. affordB. allow C. remind D. pay.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 of the food chain, _if their numbersdrop,

14、the oceans ecosystem will be in danger. Read the passage again and fill in the blanks with the words in the box. sowhen3b3bso although if but when . Many think that sharks are too strong to be endangered, _ they are wrong. _there are no scientific studies to support this, a lot of people believe tha

15、t shark fins are good for health. 5. Sharks may disappear one day _ we do not do something to stop the sale of shark fins. butAlthoughif .3 3a aMany have heard of sharks fin soup. This famous andexpensive dish is especially popular in southern China. 1) hear 为及物动词，为及物动词，“听到听到”，表结果。，表结果。e.g. I can he

16、ar you clearly.我能清楚听到你说的话。我能清楚听到你说的话。2) hear of hear about hear about和和 hear of “听别人说听别人说”常可互换，常可互换，hear about“听到听到的详细的详细” 听到的内容更详细听到的内容更详细一些，一些，hear of （指间接的听到）听别人说起或（指间接的听到）听别人说起或提及提及e.g. No one in the town had heard of him.e.g. Have you heard of / about the accident?.3) hear from 一般后接一般后接 sb. 指指“

17、收到收到来信来信”。e.g. Have you heard from Jim?你收到吉姆的来信了吗你收到吉姆的来信了吗?.But do you realize that youre killing a wholeshark each time you enjoy a bowl of sharks finsoup?.When people catch sharks, they cut off theirfins and throw the shark back into the ocean.This is not only cruel , but also harmful to theenvir

18、onment.&.harmful (adj)“有害的，不利的有害的，不利的”常用短语常用短语be harmful to sb /sth “对某人、某物有害对某人、某物有害”e.g. The air pollution is harmful to our health?空气污染对我们的健康有害空气污染对我们的健康有害e.g. Dont you think smoking is harmful tohealth?难道你不认为吸烟有害健康吗？难道你不认为吸烟有害健康吗？.Sharks are at the top of the food chain in the oceans ecosyst

19、em. .If their numbers drop too low, it will bring danger to all ocean life. .Many believe that sharks can never be endangered because they are the strongest in their food chain. .But in fact, around 70 million sharks are caught and traded in this industry every year. &.70 million “七千万七千万”million

20、数词数词“百万百万”用法用法与数词与数词hundred“百百”thousand“千千”billion“十十亿亿”1）与具体数字连用，用单数）与具体数字连用，用单数two hundred两百两百 three million 三百万三百万2) 当表示不确定的泛指数目时，要用复数，当表示不确定的泛指数目时，要用复数，且后接介词且后接介词of 如如hundreds of “数以百计的，成百上千的数以百计的，成百上千的”thousands of “数发千计的，成千上万的数发千计的，成千上万的”millions of “数百万的数百万的”.e.g. There are hundreds of books

21、on the desk.桌子上有几百本书桌子上有几百本书e.g. The sun was shining .Thousands of people were lying on the beach. 阳光灿烂，数以千计的人躺在海滩上阳光灿烂，数以千计的人躺在海滩上.&.industry (n)“工业工业” industrial(adj)“工业的工业的” e.g. New industries are springing up in Asia.新工业正在亚洲兴起新工业正在亚洲兴起.The numbers of some kinds of sharks have fallen by over

22、 90 percent in the last 20 to 30 years.&.some kinds of 固定短语，后跟名词固定短语，后跟名词“几种几种”e.g. He has some kinds of fishes at home.他家里养着几条鱼他家里养着几条鱼&.kind 短语短语 Kind of + 形容词形容词“有点有点”相当于相当于a little/ a bit/ a little bit. e.g. Im kind of hungry.我有点饿了我有点饿了 2) many kinds of +名词名词“很多种很多种”，this/ that kind of +

23、名词名词“这这/那一种那一种” e.g. This kind of film is not popular.这种电影这种电影不受欢迎不受欢迎.3) all kinds of +名词名词“各种各样的各种各样的” e.g. She likes all kinds of flowers.她喜欢各种她喜欢各种各样的花。各样的花。 4)different kinds of +名词名词“不同种类的不同种类的” e.g. There are different kinds of books in the bookshop.这家书店里有各种不同种类的书籍这家书店里有各种不同种类的书籍 5) be kind t

24、o sb “对某人友好对某人友好”相当于相当于 be friendly to sb e.g. We must be kind to wild animals in order to protect them.我们必须友好对待野生动物，我们必须友好对待野生动物，这样才能保护它们。这样才能保护它们。 6) a kind of “一种一种”1.e.g. An apple is a kind of fruit.苹果是一种水苹果是一种水果果. Environmental protection groups around the world, such as WildAid and the WWF, ar

25、e teaching the public about “finning”. .So far, no scientific studies have shown that sharks fins are good for health, so why eat them? Help save the sharks!.Two environmental groups against finning&.against (prep)“反对，对着，违反反对，对着，违反”后接动后接动词词ing 作宾语作宾语be against“反对反对”反义词组：反义词组：be for “支持支持”e.g. We

26、 are all against his idea.我们都反对他的想法我们都反对他的想法e.g. He spoke against the new law.他发言反对新法律他发言反对新法律e.g. Im against doing anything till the police arrive.我反对在警察来之前采取任何行动我反对在警察来之前采取任何行动.3 3b bSharks are at the top of the food chain, ,so if their numbersdrop, the oceans ecosystem will be in danger.Many thin

27、k that sharks are too strong to beendangered, but they are wrong.练习题练习题. 用方框中词的适当形式完成下面的句子。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

28、 much junk food is _ your health. (5) He can use different _ to work out the problem. method, cruel, harmful, afford, lawcruelaffordlawharmfulmethod.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. joinC. attend D. join in 2. I cant afford _ him an expensive