2018届九年级英语全册Unit13We’retryingtosavetheearth第3课时教案.docx

Unit 13 Were trying to save the earth! Section A Grammar Focus- 4b一、【教材分析】教学目标知识目标1. 学习并掌握新词汇：reusable, afford, transportation2. 学习并会用以下常用表达：try to do sth., used to do sth., is/are doing, be considered, take part in; play a part in doing sth., help with, help out, turn off, instead of, pay for, add up, afford to do sth., not any longer, take action, Its difficult for sb. to do sth.3. 学习并掌握下列句型：（1）Were trying to save the earth.（2）The river used to be so clean.（3）It was considered the nicest river in town.（4）The air has become really polluted.（5）We should help save the sharks.（6）Everyone should play a part in keeping the city clean.（7）You can save electricity by turning off the lights when you leave a room.（8）We cannot afford to wait any longer before taking action!（9）Its difficult for parents with young children to use public transportation.能力目标学会使用语法项目列表中的句型谈论事情。情感目标了解环境污染的坏处，树立环保意识。教学重点熟记语法项目的句型。教学难点熟记语法项目的句型。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。 It was c_ the nicest river in town.You can also use paper or r_ bags instead of plastic bags.We cannot a_ to wait any longer before taking action!We think that everyone should use public t_.I guess everyone in this city is trying to improve the e_.答案：consideredreusableaffordtransportationenvironment 2、自由交谈。朗读并记忆下列优美句子。But do you realize that youre killing a whole shark each time you enjoy a bowl of sharks fin soup?This method is not only cruel, but also harmful to the environment. Sharks are at the top of the food chain in the oceans ecosystem. If their numbers drop too low, it will bring danger to all ocean life. They have even asked governments to develop laws to stop the sale of sharks fins. .感知体验感知1.PPT展示下列图片，初步感知语法项目所列出的语法重点。Were trying to save the earth.The river used to be so clean.It was considered the nicest river in town.The air has become really polluted.We should help save the sharks.体验1.学生朗读并记忆上述句型。同学之间相互检查。感知2. 呈现现在进行时、现在完成时、被动语态、情态动词和used to 结构的语法规则。体验2.针对上述语法规则，做练习巩固。.强化巩固1. 处理教材4b的内容。Fill in the blanks with the appropriate modal verbs from the box.People _ think that big things _ be done. However, many forget that saving the earth begins with 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. 答案：may, should, could, would2.处理教材4c的内容。Make a list for 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.A: I think that everyone should take your own shopping bags when go shopping.B: I agree. its good for the environment. 3. 语言知识点的归纳整理。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。 表示主语的特征、性格、能力等 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。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：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。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。used to 结构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。.实践应用针对下列保护环境的项目进行分组讨论。use public transportationtake your own shopping bags when go shoppingreduce the use of air conditioners in summerturn off the lights when you leave the roomgrow more plants.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：reusable, afford, transportation try to do sth., used to do sth., is/are doing, be considered, take part in; play a part in doing sth., help with, help out, turn off, instead of, pay for, add up, afford to do sth., not any longer, take action, Its difficult for sb. to do sth.句型：（1）Were trying to save the earth.（2）The river used to be so clean.（3）It was considered the nicest river in town.（4）The air has become really polluted.（5）We should help save the sharks.（6）Everyone should play a part in keeping the city clean.（7）You can save electricity by turning off the lights when you leave a room.（8）We cannot afford to wait any longer before taking action!（9）Its difficult for parents with young children to use public transportation.2. 当堂练习。用所给单词的适当形式填空。 （1）The air has become really_ (pollute).（2）Everyone should _ (play) a part in keeping the city clean.（3）I guess everyone in this city is_ (try) to improve the environment. （4）You can save electricity by _ (turn) off the lights when you leave a room.（5）We cannot afford to_ (wait) any longer before taking action!答案：（1）polluted（2）play（3）trying（4）turning（5）wait.作业布置 1. Review the new words and expressions youve learned today.2. Preview the new words and expressions.