九年级英语全册《Unit 13 We’re trying to save the earth（第3课时）》教案 （新版）人教新目标版-（新版）人教新目标版初中九年级全册英语教案.doc

Unit 13 We’re 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 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）We’re 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）It’s 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。
① It was c________ the nicest river in town.
②You can also use paper or r_______ bags instead of plastic bags.
③We cannot a_______ to wait any longer before taking action!
④We think that everyone should use public t________.
⑤I guess everyone in this city is trying to improve the e_________.
答案：①considered②reusable③afford④transportation⑤environment
2、自由交谈。
朗读并记忆下列优美句子。
·But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark’s 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 ocean’s 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 shark’s fins.

Ⅱ.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。

·We’re 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。

Ⅲ.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, 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 think that everyone should use public transportation.
B: I disagree. it's 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. it's good for the environment.
3. 语言知识点的归纳整理。
现在进行时
Ø （1）含义：表示正在发生或进行的动作。
Ø （2）基本结构：
Ø 主语 + be + 现在分词（be 的形式随主语的变化而变化）
Ø （3）基本用法：
Ø ①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。
Ø ②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。
Ø ③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：
①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。
②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。
③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＋didn't 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）n't to。
He used to stay up late. 他过去常熬到很晚。

Ⅳ.实践
应用
针对下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...

Ⅴ.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, It’s difficult for sb. to do sth.
句型：
（1）We’re 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）It’s 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

Ⅵ.作业
布置
1. Review the new words and expressions you’ve learned today.
2. Preview the new words and expressions.
3. Preview 1a-1e on page 101.

三、【板书设计】
Unit 13 We’re trying to save the earth!
Section A Grammar Focus- 4b
We’re 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】