九年级英语全册 unit 13 were trying to save the earth section a（3a4c）课件 （新版）人教新目标版

Unit 13 We are trying to save the earth!,Section A,shark n. 鲨鱼,fin n. （鱼）鳍,cruel adj. 残酷的,harmful adj. 有害的,Read the passage about sharks and complete the fact sheet below.,southern China,70 million,over 90 percent,WildAid and the WWF,Read the passage again and fill in the blanks with the words in the box.,so although if but when,Many people do not realize they are killing a whole shark _ they enjoy a bowl of shark fin soup. 2. Sharks are at the top of the food chain, _ if their numbers drop, the oceansecosystem will be in danger.,when,so,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 one day _ we do not do something to stop the sale of shark fins.,but,Although,if,Language Points,1. Save the Sharks！ save作动词，意为“救，拯救”，后常跟介词from 例句：He saved thr girl form the big fire. 他从大火中就出了那个女孩。 The dog saved the boys life. 那只狗救了男孩的命。,Language Points,（1）save作及物动词，意为“储蓄；贮存；节省”。 例句：She saved her strength for the last minutes of the race. 他保存体力，准备在比赛的最后几分钟冲刺。 （2）save作不及物动词，意为“节省；存钱贮存物品”。 例句： Some animals save for the future. 一些动物为未来之需储存食品。,拓展,Language Points,2. when people catch sharks, they cut off their fins and throw the shark back into the ocean. cut off有以下几种意思： （1）切断（水、电）；中断；关掉 例句：Their water supply was cut off. （2）切下来；剪下来 例句：They cut off the heads of their captives. 他们把俘虏的头砍了下来。,Language Points,（3）孤立 例句：The enemy soldiers were cut off from their headquaters. 敌军同总部的联系被切断，成了孤军。 The flood cut off the villages from the rest of the world. 洪水切断了村民们与外界的联系。 （4）剥夺继承权 例句： He has cut his son off without a penny. 他取消了儿子的继承权，一便士也不给。,Language Points,3. A shark can no longer swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。,no longer意思是“不再” 例句：Im no longer a student. 我不再是个学生了。,有两个短语和no longer同义，即notany longer和notany more，但他们侧重的方面不同。,Language Points,4. This method is not only cruel, but also harmful to the environment. 这种方法不但残忍而且对环境有害。,（1）not onlybut also 用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅而且”; 其中的also有时可以省略。,Language Points,例句：She not only plays well, but also writes music. 她不但很会演奏，而且还会作曲。 Not only men but also women were chosen. 不仅仅是男的，女的也有被选中的。,Language Points,若连接两个成分作主语，其谓语通常与靠近的主语保持一致。 例句：Not only you but also he has to leave. 不只是你，他也得离开。,not only放在句首，后接句子时要用倒装结构。 例句：Not only had the poor man been fined, but also he had been sent to prison. 这个可怜的人不仅被罚款，而且还被 送进了监狱。,（2）be harmful to 对有害 例句： Smoking is harmful to the health. 吸烟有害健康。 Playing computer games much is harmful to students. 电脑游戏玩太多对学生有害。,Language Points,5. Sharks are at the top of the food chain in the oceans ecosystem. 鲨鱼位于海洋生物系统食物链的顶部。,at the top of 在最高地位; 用最高最大的(速度, 声音等) 例句： I looked at the top of his head, his hair shiny and parted smoothly. 我看他的头顶, 头发闪亮且平滑的分开。,Language Points,He shouted at the top of his voice in order that he might be heard. 他尽力大声叫喊, 以便别人能听见。,Language Points,6. If their numbers drop too low, it will bring danger to all ocean life. 如果它们的数目降至过低，会给所有 海洋生物带来危险。 此句复数形式的numbers表达全海洋中鲨 鱼的总量。当表示数值的高或低时，number要用high或low修饰。,例句：In that country, the number of children going to school is higher in cities than in towns and village. 在那个国家，城市儿童入学人数比乡镇 及农村要高。 常与number搭配的动词有grow, fall等。 例句：The number of families that own cars has been growing quickly recently. 近来拥有轿车的家庭数量增长很快。,7. Environment protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. 世界各地的环境保护组织，如野生救援协 会和世界自然基金会，都在教育公众有关 “猎翅”的行为。 句中fin本为名词，指 “鱼鳍”。此句中的 finning由动词化的fin（割鲨鱼鳍以获取 鱼翅）的-ing形式转化而成，指课文中所 陈述的 “猎翅”这一行为。,Exercise,1. （2013福建泉州）If we take a shower instead of bath, more water_. A. has saved B. can save C. can be saved 2. I was_ in thr middle school of the telephone call. A. cut off B. cut down C. cut in D. cut away,Homework,Write 5 measures to protect the environment.,Grammar Focus,Present progressive,used to,Passive voice,Present perfect,Modal verbs,现在进行时: Present Progressive,定义：表示说话时(瞬间)正在进行的动作, 也表示目前或现阶段正在进行的动作。,结构: be (am/is/are) + v.-ing 标志词：Look, Listen, now, right now e.g. Look! The boy is crying.,Exercise,What a fine day today! Look! What are they doing?,used to do与be used to doing,used to do sth. 表示过去常常做某事, 而现 在往往不做了, 后接动词原 形。 be used to doing sth. 表示习惯于做某事 e.g. I used to get up at six oclock. Joe is used to drinking a cup of coffee every morning.,Exercise,1. 她过去常常周末和朋友去购物。 She used to go shopping with friends on weekends. 2. 他习惯于每天晚上睡得很晚。 He is used to staying up.,被动语态：Passive voice,定义：表示主语是动作的承受者，即行 为动作的对象的一种语态。 结构：be + 过去分词 e.g. A new school was built last year. Our classroom is cleaned every day.,Exercise,1. 刚才一些老年人参观了博物馆。 2. 工人们使用不同种类的机器工作。,The museum was visited by some old people just now.,Different kinds of machines are used to work by the workers.,现在完成时: Present Perfect,定义：表示动作已经完成, 但对现在造成影 响; 或者表示从过去某一时间开始一 直延续到现在并还可能持续下去的 动作。,结构: has/have + 过去分词 标志词：already, yet, ever, never, since, for e.g. I havent finished my homework yet.,Exercise,1. I _ (be) in Beijing for two years. 2. I _ never _ (hear) of that man before. 3. Tom _ (work) there since two years ago.,have been,have,heard,has worked,情态动词,1. 情态动词本身有一定的词义, 表示说话人的情绪、态度或语气, 但不能单独作谓语, 只能与其他动词构成谓语。常见的有: can (could), may (might), must, need, shall (should), will (would)等。,2. 情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式, 可用来表达更加客气、委婉的语气。 e.g. Ken can climb up the tress like a koala. Tracy could ride a bicycle when she was five years old. You mustnt play with fire. It is dangerous.,Exercise,1. 我们不能在教室里吃东西。 2. 首先你必须完成作业。 3. 他现在不可能在家。 4. 她一定知道这个问题的答案。,We cant eat in the classroom.,You must finish your homework first.,He cant be at home now.,She must know the answer to this question.,Fill in the blanks with the correct forms of the verbs in brackets.,Joe: _ you ever _ (take) part in an environmental project ? Eric: Yes, I have. I _ (help) with a Clean-Up Day last year. It was _ (consider) the biggest clean-up project this city _ ever _ (have).,Have,taken,helped,considered,had,had,Joe: How many people _ (take) part? Eric: 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 environment. Eric: Yes, we cant afford to _ (wait) any longer to take action!,took,think,came,trying,wait,Fill in the blanks with the appropriate modal verbs from the box.,can would could have to should must may/ might,People _ think that big things _ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _ save,may/might,must,can,electricity by turning off the lights when you leave a room. You _ also use 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 bike or walk. If its far, you _ take the bus. All these,could,have to,can/should,can/could,small things _ add up and become big things that _ improve the environment. Lets take action now!,could,would/can,Make a list of things that people can do to help the environment an