Unit 13 We're trying to save the earth Section A 1a-4c 学案（无答案）

Unit 13 We’re trying to save the earth!
Name: ___________ Group: _____________ Class: _____________
Period1
Section A 1a-4c
【Topic】
Talk about pollution and environmental protection.
【Get ready before class】
Ⅰ温故知新
一、 回答下列问题。
1. What kinds of pollutions do you know？
2. What do you feel about the pollution
Ⅱ新知探究
一、预习课本，找出下面生词的原句并翻译。
advantage: 原句
翻译
cost: 原句
翻译
cruel: 原句
翻译
afford: 原句
(
熟读后，不看课文完成！挑战下自己吧！
)翻译
二、熟读Grammar Focus，完成下列句子。
1.我们正在竭尽全力拯救地球! We_______ _________ to save the earth!
2.这条河流过去很干净。____________
3.空气被污染严重。_______
4.没有任何科学研究表明，鱼翅对健康有好处。_______________________________________
三、词海拾贝。
1. 不同种类的污染 2. 河底 3. 把垃圾扔到河里
4. 在……中起作用 5. 在中国南部 6. 对……有害
7. 在……顶部 8. 海洋生态系统
1. 现在进行时: Present Progressive
定义：表示说话时（瞬间）正在进行的动作，也表示目前或现阶段一直进行的动作。
结构: be (am/is/ are) + v.-ing 标志词：Look, Listen, now, right now…
e.g. Look! The boy is ______________(cry).
2. 被动语态：Passive voice
定义：表示主语是动作的承受者，即行为动作的对象的一种语态。
结构：be + 过去分词
e.g. (1)A new school was________(build) last year. (2) Our classroom is ______(clean) every day.
3. 现在完成时: Present Perfect
定义：表示动作已经完成, 但对现在造成影响; 或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。
结构: has/have + 过去分词 标志词：already, yet, ever, never, since, for…
e.g. I (not finish) my homework yet.
4. 情态动词
(1) 情态动词本身有一定的词义，表示说话人的情绪、态度或语气，但不能单独作谓语，只能与其他动词构成谓语。常见的有：can (could), may (might), must, need, shall (should), will (would)等。
(2) 情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式, 可用来表达更加客气、委婉的语气。
e.g. You mustn’t play with fire. It is dangerous.
【Enjoy in class】
Feedback for the new words. 词汇识记反馈
Complete the sentences.
1. We should put up notice to stop from _____________ (乱扔）.
2. The teacher asked us to find a way to pick up the coins at the ______ (底部）of the bottle.
3. There are no more fish for _________ (渔夫）to catch in the river.
4. We should take the paper bags to go shopping instead of the _______ (塑料）ones.
5. Could you please tell us another _________(优点）of riding bike to work
Listen & Practice 1b
Listen again and check (√) the sentences you hear.
( )1) We could go fishing in the river.
( )2) The river was really dirty.
( )3) The river has always been the nicest river in this town.
( )4) We should ask the teachers for help.
阅读3a短文，判断正误。
Sharks are endangered, read the passage and judge the sentences.(T or F)
( )①Shark’s fin（鱼鳍）soup is famous and expensive all around the world.
( )②We have to kill a whole shark to get a bowl of shark’s fin soup.
( )③People cut off sharks’ fins and throw the sharks back into the ocean.
( )④Sharks are in the bottom of the food chain in the ocean’s ecosystem.
( )⑤Wild Aid and the WWF are environmental protection groups in China.
( )⑥Shark’s fin s are good for health.