1、=【 ;精品教育资源文库 】 = 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, transportation 2. 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
2、off, instead of, pay for, add up, afford to do sth., not ? any longer, take action, It s 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）
3、 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
4、 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 1、检查生词预习。 =【 ;精品教育资源文库 】 = I. 复习 热身 （ 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 pap
5、er 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 ： considered reusable afford transportation environment 2、自由交谈。 朗读并记忆下列优美句子。 But do you realize tha
6、t 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 aske
7、d governments to develop laws to stop the sale of sharks fins. 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. =【 ;精品教育资源文库 】 = .感知 体验 It was considered the nicest river in town. The air has become really polluted. We should help save the sharks. 体验 1.
8、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 examp
9、le, 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, would 2.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 thin
10、k 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 =【 ;精品教育资源文库 】 = ?
11、 （ 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：
12、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
13、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： =【 ;精品教育资源文库 】 = 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
14、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
15、列保护环境的项目进行分组讨论。 use public transportation take your own shopping bags when go shopping reduce the use of air conditioners in summer turn off the lights when you leave the room grow more plants. 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 d
16、oing, be considered, take part in; play a part in doing sth., help with, help out, turn off, instead of, pay for, =【 ;精品教育资源文库 】 = .总结 反馈 add up, afford to do sth., not ? any longer, take action, It s difficult for sb. to do sth. 句型 ： （ 1） Were trying to save the earth . （ 2） The river used to be so
17、 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 w
18、ait any longer before taking action! （ 9） Its difficult for parents with yo ung 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 imp
19、rove 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 1. Review the new words and expressions youve learned today. =【 ;精品教育资
20、源文库 】 = 布置 2. Preview the new words and expressions. 3. Preview 1a-1e on page 101. 三、【板书设计】 Unit 13 Were trying to save the earth! Section A Grammar Focus- 4b 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. 四、【教学反思】 【 163 文库：各类精品优质课，公开课课件 ppt;教案，教学设计，各类试题复习资料，工作文档等上百万
