2018届九年级英语全册Unit13We’retryingtosavetheearth第2课时教案.docx

Unit 13 Were trying to save the earth! Section A 3a3c一、【教材分析】教学目标知识目标1.学习并掌握新词汇：shark, fin, method, cruel, cut off, harmful, chain, ecosystem, low, industry, law, environment,environmental, scientific2. 学会并正确使用以下常用表达：hear of, cut off, throwinto, no longer, not onlybut also, be harmful to, at the top of the food chain, the sale of ,ask sb. to do sth., so far, be good for, be against, in danger3. 学会使用以下句型：（1） Do you realize that youre killing a whole shark each time you enjoy a bowl of sharks fin soup?（2）When people catch sharks, they cut off their fins and throw the shark back into the ocean.（3）This method is not only cruel, but also harmful to the environment. （4）The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.（5）They have even asked governments to develop laws to stop the sale of sharks fins.能力目标通过文段阅读，提高阅读理解能力。情感目标了解环境污染的坏处，树立环保意识。教学重点会用重点词汇和句型。教学难点语言知识点的运用。教学方法情境教学法；任务型教学法二、【教学流程】环节师生活动二次备课I. 复习热身1、检查生词预习。（1）先通过PPT呈现本课的单词，教师领读，学生跟读，并帮助学生正音。（2）做题巩固。根据句意和首字母提示写出所缺的单词。This method is not only c_, but also harmful to the environment.Sharks are at the top of the food chain in the oceans e_.But in fact, around 70 million sharks are caught and traded in this i_ every year.Many have heard of sharks f_ soup.If their numbers drop too low, it will bring d_to all ocean life.答案：cruelecosystemindustryfindanger 2、自由交谈。T: The earth is badly polluted. What should we do to save the earth?S1: Take buses instead of driving cars.S2: Turn off the lights when you leave a room.S3: Recycle books and paper. .感知体验感知1.PPT展示下列图片。创设情景：There are some animals are endangered. We should do something to protect the animals and the environment! 体验1. 分组谈论如何保护濒危动物。The zoos provide homes for many endangered animals. 感知2.PPT展示屠杀鲸鱼图片，创设问题情境：Have you ever seen a shark? What do you know about sharks?体验2. 同学之间阅读文章并谈论找出答案。.强化巩固1. 处理教材3a的内容。Where shark fin soup is popularsouthern ChinaNumber of sharks caught and traded every year70 millionHow much the numbers of some kinds of sharks have fallen in the last 20 to 30yearsover 90 percent Two environmental groups which are against “finning”Wild Aid and the WWF2.处理教材3b的内容。Read the passage and fill in the blanks with the words in the box. Many people do not realize they are killing a whole shark _ they enjoy a bowl of sharks fin soup.Sharks are at the top of the food chain, _ if their numbers drop, the oceans ecosystem will be in danger.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 that sharks fins are good for health.Sharks may disappear one day_ we do not do something to stop the sale of sharks fins.答案：when so but Althoughif3. 语言知识点的归纳整理。（1）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” Im no longer a student. 我不再是个学生了。 （2）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。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。 She not only plays well, but also writes music. 她不仅很会演奏，而且还会作曲。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。如: Not only you but also he has to leave. 不只是你，他也得离开。 若连接两个句子，not only后面的句子要用倒装。 Not only did he speak more correctly, but he spoke more easily. 他不仅说得更正确，而且讲得更不费劲了。（3）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。 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。.实践应用写出保护濒临动物的几项措施：1. Dont kill them and destroy their homes.2. Plant more trees.3. Develop laws to protect them.总结反馈1.结合板书和课件，让学生盘点所学词汇和句型。词汇：shark, fin, method, cruel, cut off, harmful, chain, ecosystem, low, hear of, cut off, throwinto, no longer, not onlybut also, be harmful to, at the top of the food chain, the sale of ,ask sb. to do sth., so far, be good for, be against, in danger句型：（1） Do you realize that youre killing a whole shark each time you enjoy a bowl of sharks fin soup?（2）When people catch sharks, they cut off their fins and throw the shark back into the ocean.（3）This method is not only cruel, but also harmful to the environment. （4）The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.（5）They have even asked governments to develop laws to stop the sale of sharks fins.2. 当堂练习。单项选择。（1）Many have _ sharks fin soup. A. heard of B. hear of C. hearing of D. heard from（2）But do you realize that youre killing a whole shark _ you enjoy a bowl of sharks fin soup? A. if B. when C. but D. although（3）When people catch sharks, they _ their fins A. cut down B. cut in C. cut off D. cut up （4）Without a fin, a shark can_ swim and slowly dies. A. not any more B. not any longer C. not longer D. no longer（5）Sharks are at the top of the food chain, _ if their numbers drop, the oceans ecosystem will be in danger. A. but B. although C. so D. when答案：（1）A（2）B（3）C（4）D（5）C.作业布置 1. Review the new words and expressions youve learned today.2. Read and recite the passage.3. Preview the new words and expressions.4