1、Unit 13 Were trying to save the earth. Section A 3a4c,What did you see in the video?,food chains 食物链,ocean ecosystem 生态系统,Many people think that sharks are too strong to be endangered, but they are wrong.,The sharks are endangered!,Read the passage quickly,Para.1 A. Two groups against “finning”.Para
2、.2 B. Something about shark fin soup.Para.3 C. Sharks are endangered now.,鳍,shark fin soup,1. Where is shark fin soup popular?,2. What does it mean when people enjoy a bowl of shark fin soup?,Read Para. 1,southern China,Theyre killing a whole shark when they enjoy a bowl of shark fin soup.,How do pe
3、ople kill the sharks?,1. How do people deal with them when they catch the sharks?,2. Without a fin, what will happen to a shark?,They cut off their fins throw them back into the ocean.,It will die.,Read Para. 2,1.Why is it harmful to the environment?,2. What do the two numbers mean?,70 million,90 pe
4、rcent,Sharks are at the top of the food chain, so if their numbers drop too low, it will bring danger to all ocean life.,Around 70 million sharks are caught and traded every year.,The numbers of some kinds of sharks have fallen by over 90 percent in the past 20 to 30 years.,Read Para. 3,2. What are
5、they doing & what have they done?,1. What are the two environmental protection groups?,Read Para. 3,1. What are the two environmental protection groups?,美国野生救援会(WildAid)是1999年在美国注册的非盈利机构，总部在美国旧金山， 它对濒临绝迹的野生动物提供直接的保护，并且发展许多有创意的计划，以教育大众关于野生动物及生态平衡的重要性。,世界自然基金会(WWF)是在全球享有盛誉的、最大的独立性非政府环境保护组织之一，自1961年成立以
6、来，WWF一直致力于环保事业，在全世界拥有超过500万支持者和超过100个国家参与的项目网络。,Read Para. 3,2. What are they doing & what have they done?,They are teaching the public about “finning”.,They have even asked governments to develop laws(法律) to stop the sale of shark fins.,Are the shark fins good for health？,No scientific studies have
7、 shown that shark fins are good for health.,Grammar focus,本单元复习现在进行时、used to句型、被动语态、现在完成时和情态动词。,现在进行时,(1) 含义：表示正在发生或进行的动作。 (2) 基本结构： 主语 + be + 现在分词（be 的形式随主语的变化而变化） (3) 基本用法： 表示现在正在进行的动作。特征：常常与now或具体的时间连用，有时句中会有感官动词来提示，或通过上下文来暗示。 表示现阶段一直进行的动作。这类动词常常是延续性动词。常于at present, this week, these days等连用。 表示主语
8、的特征、性格、能力等,本单元复习现在进行时、used to句型、被动语态、现在完成时和情态动词。,现在完成时,(1) 含义：表示过去发生的动作对现在还有影响。 (2) 基本结构：主语 + have / has + 过去分词 (3) 基本用法： 表示过去发生的动作，但强调对现在产生影响。特征：不能与表示具体的时间状语连用。 表示过去发生的动作或存在的状态一直延续到现在，还可能继续下去。常常与since, for, in the past + 时间名词，in the last +时间名词等时间状语连用，而且谓语动词要求是延续性动词。 表示一种“经历或体验”，即可以表示经历过也可以是从来都没有经历过
9、。,本单元复习现在进行时、used to句型、被动语态、现在完成时和情态动词。,被动语态,初中阶段我们学习了七种被动结构，归纳如下： (1) 一般现在时是被动语态：am / is / are + 过去分词 (2) 现在完成时的被动式：have / has + been + 过去分词 (3) 现在进行时的被动式：am/ is/ are + being + 过去分词 (4) 一般过去时的被动式：was / were + 过去分词 (5) 过去进行时的被动式：was / were + being + 过去分词 (6) 过去完成时的被动式：had + been + 过去分词 (7) 一般将来时的被动式
10、：will / be going to be+ 过去分词 (8) 含有情态动词的被动式：情态动词+be +动词的过去分词。,本单元复习现在进行时、used to句型、被动语态、现在完成时和情态动词。,情态动词,情态动词表示说话人对某一动作或状态的态度，如认为“可能”、“应当”、“必要”等。情态动词本身有一定的意义，但不能单独作谓语，也没有人称和数的变化。后面一般跟动词原形。,本单元复习现在进行时、used to句型、被动语态、现在完成时和情态动词。,used to句型,used to意为“过去常常做某事”，指的是过去的习惯性动作，目的在于与现在形成对照。used to是个情态动词，其中的to是
11、不定式符号，后面跟动词原形。 在美式英语中,它的疑问式是：Did 主语use to do sth.？否定式是：主语didnt use 在英式英语中，它的疑问式应当是：Used 主语to sth.？否定式应当是used not to或use(d)nt to。 He used to stay up late. 他过去常熬到很晚。,Fill in the blanks with the correct forms of the verbs in brackets.,Joe: _you ever _ (take) part in an environmental project? Ken: Yes,
12、I have. I _ (help) with a Clean-Up Day last year. It was_(consider) the biggest clean-up project this city ever _(have). Joe: How many people _ (take) part? Ken: I _ (think) more than 1,000 people _(come) to help out. Joe: Thats fantastic! I guess everyone in this city is _ (try) to improve the envi
13、ronment. Ken: Yes, we cant affort to _ (wait) any longer to take action!,Have taken,helped,considered,had had,took,think,came,trying,wait,Fill in the blanks with the correct forms of the verbs in brackets.,People _ think that big things _ be done. However, many forget that saving the earth begins wi
14、th small things. For example, you _ save electricity by turning off the lights when you leave a room. You _ also use paper or reusable bags instead of plastic bags. I think its a great idea that you now _ pay for plastic bags in some stores. And instead of driving to school or work, you _ ride your
15、bike or walk. If its far, you take the bus. All these small things _ add up and become good things that _improve the environment. Lets take action now!,may,should,could,would,have to,can,could,can,Make a list fo things that people can do to help the environment and discuss your list with your partner.,A: I think that everyone should use public transportation. B: I disagree. Its difficult for parents with young children to use public transportation,Homework,老师可以在这里布置作业噢,
