Unit 3 Care for the Earth Part A
教材分析
本单元教学共分为2课时，本课是第一课时，以保护环境展开话题，主要是对Let’s learn中的动词短语进行学习。
教学目标
【知识与能力目标】
1. 以学习Let’s learn部分所列举的动词短语为主，要求学生能听说、读、写词汇：pick flowers cut down trees the earth make the air dirty waste water drive a car，并熟练运用。
2. 能够正确模仿Let’s talk 中的对话，做到语音语调自然。
3. 能借助should和shouldn’t表达应该做或不应该做的事情，并能灵活运用Why not…? 句型提出建议。
【过程与方法目标】
引导学生问完成Let’s learn, 理解let’s talk的对话内容。
【情感态度价值观目标】
通过对对话的学习，增强学生日常文明行为意识。
【教学重点】
1. 以学习Let’s learn 部分所列举的动词短语为主，要求学生能听说、读、写词汇：pick flowers cut down trees the earth make the air dirty waste water drive a car ，并熟练运用。
【教学难点】
1. 能够正确模仿Let ’s talk 中的对话，做到语音语调自然。
2. 能借助should和shouldn’t表达应该做或不应该做的事情，并能灵活运用Why not…? 句型提出建议。
课前准备
教师准备：
1. 一束花、一双一次性筷子、一个垃圾袋及一些垃圾的图片。
2. Let’s learn部分的教学卡片。
3. Let’s learn部分的音频。
4. Let’s talk部分的音频。
教学过程
1. Read and think
(1) 教师引导学生观察图片并讨论。
T: Look at the pictures. Are the little bird and the fish happy? Why? What happened? Can you read and find the reason?
让学生读对话，找到答案并进行讨论。
2. Look and circle
通过完成此部分活动，引出课文的话题：We should do something to care for “Mother Earth”.
(1) 教师引导学生观察图片并展开讨论，圈出文明行为。
(2) 教师引领学生用We should / shouldn’t...描述图片，如：?
对于不文明行为，学会这样说：
第一行第一幅图：We shouldn’t climb the tree to catch birds.
第一行第三幅图：We shouldn’t waste water.
第二行第三幅图：We shouldn’t pick flowers.
对于文明行为，就说：We should...
教师提问：What should we do? What shouldn’t we do? 学生集体作答。
3. Let’s learn
(1) 学习短语pick flowers
教师出示所准备的一束花并与学生进行对话：
T: Look. What are these?
Ss: They are flowers.
T: What color are they?
Ss: They are...
T: In which seasons can we see many flowers?
Ss: Spring and summer.
T: Well. We can see many beautiful flowers in the garden. I want to pick some flowers and take them home. Can I do that?
Ss: No.
T: No. We can’t pick flowers.
教师板书并领读短语pick flowers，注意纠正学生的错误读音。
(2) 学习短语cut down trees
教师出示一次性筷子并与学生进行对话：
T: Look at these chopsticks. What can we do with them?
Ss: We can eat with them.
T: Well. People often use them in our daily life, but where are they from?
Ss: They are from trees.
T: Yes. Trees are cut down to make chopsticks. Usually, we use them only once. Every year, people cut down many trees. Do you think it is right?
Ss: No.
T: So we can’t cut down too many trees.
教师板书并领读短语cut down trees，学生边做动作边说短语。
学习短语drive a car
教师假装摘花，问学生：What am I doing? Can I pick flowers? 然后问学生：Can we cut down many trees? 教师再做开车的样子，通过问答，用不同的句式反复介绍短语：
T: What am I doing, can you guess?
I’m driving. I’m driving a car. I can drive a car.
可连续和几个学生进行问答活动：
T: Can you drive a car, S1?
Can you show us how to drive a car?
教师板书并领读短语drive a car，要求学生边说短语边做动作。
(4) 教师借助图片教授make the air dirty, waste water, 然后请学生分组读短语，教师可以引导学生发现drive, make, waste三个词中的元音字母读音都符合“元音+辅音+不发音的字母e”结构，元音字母都读字母本身音。
(5) 通过图片引导学生认读词汇the earth.
教学小贴士
the earth, the sun, the moon这三个表示天体的名词前都要用定冠词the。教师要特别提醒的是，earth的发音是以元音因素开头的，其前面所用的定冠词读[ei?]
(6) 教师播放Let’s learn部分的录音，让学生模仿其语音语调跟读词汇。
4. Let’s talk
(1) 教师出示此部分的教学挂图，引导学生观察图片。
T: Oh. Let’s take out the books and open them. It’s time to go to school. Let’s see how Su Nan is going to school today. How is he going there? Let’s listen to the dialogue.
(2) 教师播放录音，并就对话提出第一个问题。
Question 1: How will Su Nan go to school?
听完对话后，教师请学生回答问题。教师引导学生用完整的句子说出问题的答案：He is going to school by bike.
(3) 教师再次播放对话的前两句录音，并就本段对话进一步提出问题，让学生找出更多问题的答案。
Question 2: Does Su Nan have some more soup? Why?
教师引导学生回答：No, he doesn’t. Because he has no time. He has to clean his bike. 然后让学生找出文中的原句：I have no time. I have to clean my bike.
教师板书并讲解句型：Why not go in your dad’s car? Why not do …？
教师要注意创设具体的情境帮助学生理解Why not…？的用法。
教学小贴士
Why...? 和Why not.
1. ---Why?
---Because...
这是典型的就原因问答的句型结构。当我们不明白某种现象原因时，可直接用Why?或Why构成的特殊疑问句进行询问；回答时可直接陈述理由或用because引导出原因。
---Why are you late for class?
---Because I went to bed very late last night and got up late this morning.
2. Why not do…？表示“何不……为什么不……？”是一种用来向别人提出建议的句型，也可用来反问。如：
We are free tomorrow. Why not go to the park together?
教师板书并讲解句型:
We shouldn’t drive the car today.
我们今天不应该开车。
We should do something for our earth.
我们该为我们的地球做点事。
We should/ shouldn’t do ...我们应该/不应该……常用来陈述个人对某种现象的看法和观点，而something在这里指“一些事情”。
5. Practice
(1) 自读对话一分钟。
(2) 小组合作，练习对话并表演，其他同学评价。
6. Homework
(1) 记录生活中那些行为是我们应该哪些是不该做的（不少于5句话）。
(2) 预习“Let’s learn more”。
Unit 3 Care for the Earth Part A 同步练习
判断划线部分的读音的异同 ( ) 1. feet sheep
( ) 2. sweater speak
( ) 3. leaf team
( ) 4. tree tea
( ) 5. heavy beat
( ) 6. great beach
根据句意和首字母补全单词
1. We should p_______ more trees and help the animals.
2. We shouldn’t _______ (砍伐) more trees.
3. There is m_______ grass under the tree.
4. It’s time to _______ (关爱) Mother Earth.
5. You drink _______ (太多) water.
单项选择 ( ) 1. How _______ we save water?
A. do B. does C. doing
( ) 2. She is going to _______ trees on the hill.
A. plant B. planting C. planted
( ) 3. I should go to work _______ today.
A. on foot B. by foot C. on bus
( ) 4. You _______ go out to play for a while.
A. have better B. had better C. has better
( ) 5. We live _______ the earth _______ many animals.
A. in; with B. on; with C. on; and
根据常识选一选
It’s raining.
1. You _______ (A. should B. shouldn’t) take your umbrella.
2. You _______ (A. should B. shouldn’t) put on your rubber boot.
3. You _______ (A. should B. shouldn’t) go swimming.
4. You _______ (A. should B. shouldn’t) stand under the tree.
按要求完成下列各题
1. There are some trees on the earth. (改为一般疑问句)
_____________________________________________________________________
2. We should cut down more trees. (改为否定句)
_____________________________________________________________________
3. We live on the earth. (对画线部分提问)
_____________________________________________________________________
4. You should help the animal. (对画线部分提问)
_____________________________________________________________________
5. Pick flowers. (改为否定句)
_____________________________________________________________________
参考答案
判断划线部分的读音的异同
1-6 √×√√××
根据句意和首字母补全单词
1. plant 2. cut down 3. much 4. care for 5. too much
单项选择
1. A 解析：主语是we，动词用原型do。
2. A 解析：go to do,用动词原形。
3. A 解析：on foot、by bus 固定搭配。
4. B 解析：翻译“你最好还是出去玩一会儿”had better do sth.你最好做，固定搭配。
5. B解析：on the earth, 和...一起用介词with。
根据常识选一选
1. should 解析：下雨天应该打伞，肯定。
2. should 解析：下雨天应该穿雨鞋，肯定。
3. shouldn’t 解析：下雨天不应该游泳，否定。
4. shouldn’t 解析：下雨天不应该在树下，否定。
按要求完成下列各题
1. Are there any trees on the earth?
2. We shouldn’t cut down more trees.
3. Where are we live?
4. What should you do?
5. Don’t pick flowers.
课件17张PPT。drive/dra?v/ (动词)驾驶;开(车)dirty/?d??ti/ (形容词)脏的earth/?:θ/ (名词)地球pick/p?k/ (动词)采;摘make the air dirty 污染空气cut down 砍伐;把……砍倒waste/we?st/ (动词)浪费 pick flowers 摘花drive a car 开车Read and thinkBird: Help! Help!
Colin: What’s the matter, little bird?
Bird: I can’t find my home. What should I do?
Colin: Oh, poor little Bird!Fish: Help! Help!
Wu Chen: What’s the matter, little fish?
Fish: The water is too dirty. I can’t live here.
Wu Chen: Oh, poor little Bird!Look and circleWhat should we do?Let’s learnpick flowersmake the air dirtythe earthcut down treesdrive a carwaste water小贴士the earth, the sun, the moon这三个表示天体的名词前都要用定冠词the。特别提醒，earth的发音是以元音因素开头的，其前面所用的定冠词读[ei?]Let’s talkMom: Some more soup, dear?
Su Nan: Thanks, Mom. But I have no time.
I have to clean my bike.
Mom: Are you going to school by bike? Why not go in your dad’s car?
Su Nan: We shouldn’t drive the car today.Mom: Why?
Su Nan: Because today is World Car Free Day. It’s time to do something for our earth.
Mom: I see. I think I should go to work on foot today.
Su Nan: Great, Mom! Thank you.1. How will Su Nan go to school?2. Does Su Nan have some more soup? Why?He is going to school by bike.No, he doesn’t. Because he has no time. He has to clean his bike. Listen and answer— Why …?
— Because …? 当我们不明白某种现象原因时，可以直接用Why?或者why构成的特殊疑问句进行询问；回答时可直接陈述理由或用because引导出原因。— Why are you late for class?
— Because …? 小贴士 Why not …? Why …? We are free tomorrow.
Why not go to the park together?VSWhy not do …? 表示“何不 ……？为什么不……？”
是一种用来向别人提出建议的句型，也可以用来反问。
如：小贴士We shouldn’t driver the car. We should/ shouldn’t …We should do something for our earth. 我们应该/不应该……注：常常用来陈述个人对某种现象的看法和观点。PracticeRead it by yourself for one minute .
自读对话一分钟。自己读对话，比一比看谁能在一分钟内读完，并且读得准确、流利！一分钟倒计时601030204050小组合作，练习对话并表演，其他同学评价。OK!Great!Super!1.. 记录生活中那些行为是我们应该哪些是不应
该做的（不少于5句话）。
2. 预习“Let’s learn more”。Homework谢 谢
