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Unit 13 We’re trying to save the earth!
Section A 3a -3c 教学设计
Class Type
Reading
To have the awareness (意识)of protecting sharks and respecting nature.
Objectives To understand the passage about endangered animals—sharks.
To learn to use some words and expressions.
Period 2
Procedure
Present a picture of shark and led students to do some free talk about it. Watch a video to
know about sharks, and then talk about the situation of them.
Lead-in Do you think they are endangered?
Why are they endangered?
Presentation: Listen to the article and find out:
1. Where is the article probably from? ( )
A. A book. B. A magazine. C. A newspaper.
Read the title, the first and last sentences in each paragraphs and match the main ideas.
Talk about shark fin soup. Para. 3
Sharks are endangered now. Para. 1
Appeal(呼吁) to people against eating shark fins. Para. 2
Read paragraph1 and write T for true and F for false.
1. Shark’s fin（鱼鳍）soup is famous and expensive all around the world. (
)
2. We have to kill a whole shark to get a bowl of shark’s fin soup. ( )
Read paragraph 2, answer the question and then fill in the chart.
1. What does the writer think of cutting fins of sharks?
Questions Answers
Numbers of sharks caught and traded every year
How much the numbers of some kinds of sharks have
fallen in the last 20-30 years.
Read paragraph 3 answer the questions:
1.What are the two environmental groups against “finning”?
2.How do they help to save sharks?
Retell the passage.
Some people like to eat shark fin soup, especially in _________China. But
getting the shark fin is very _____. When people catch the sharks, they ____
____ their fins and throw the sharks into the ocean. The sharks slowly dies
because they can’t _____ without fins. And it is also ________ to the
Step 1
environment. Sharks are at the ___ of the food chain. If the number of sharks
drops too low, it will break the balance of the nature. Please say no to eating
shark fin soup, and take action to save the sharks!
Activity 3b: Read the passage again and fill in the blanks with thewords in the box.
Discussion: What should we do to save the wild life?
Summary:
1. A shark can no longer swim and slowly dies.
鲨鱼不能再游泳然后慢慢死掉。
no longer意思是“不再” , 相当于not any longer。
e.g. Mr Brown no longer lives here.
布朗先生不再在这里居住了。
= Mr Brown doesn’t live here any longer.
2. This method is not only cruel, but also harmful to the environment.
这种方法不但残忍而且对环境有害。
not only…but also…
用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅……
而且……”; 其中的also有时可以省略。
e.g. She not only plays well, but also sings well.
她不但很会演奏，而且唱歌也很好。
Not only children but also the old can swim here.
不仅是孩子，老人也可以在这里游泳。
若连接两个成分作主语，其谓语通常与靠近的主语保持一致。
e.g. Not only you but also he has to leave.
不只是你，他也得离开。
be harmful to 对……有害
e.g. Smoking is harmful to the health.
吸烟有害健康。
Playing computer games much is harmful to our eyes.
电脑游戏玩太多对眼睛有害。
3. Sharks are at the top of the food chain in the ocean’s ecosystem.
鲨鱼位于海洋生物系统食物链的顶部。
at the top of 在……最高地位; 用最高[最大]的(速度, 声音等)
e.g. He has a large house at the top of that mountain.
他有所房子在那座山顶上。
4. If their numbers drop too low, it will bring danger to all ocean life.
如果它们的数目降至过低，会给所有海洋生物带来危险。
此句复数形式的numbers表达全海洋中鲨 鱼的总量。当表示数值的
高或低时，number要用high或low修饰。
e.g. In China, the number of children going to school is much higher than
twenty years ago.
在中国，儿童入学人数比20年前要高很多。
常与number搭配的动词有grow, fall等。
e.g. The number of foreign students in this school is growing every year. 这所
学校里，外国学生的数量每年都在增加。
Grammar Focus:
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正在进行
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 crying.
2. used to do与be used to doing
used to do sth. 表示过去常常做某事, 而现 在往往不做了, 后接动词原形。be used to doing sth. 表示习惯于做某事
e.g. I used to get up at six o’clock.
Joe is used to running for half an hour every morning.
Step 2 3. 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. A new school was built last year.
Our classroom is cleaned every day.
4. 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, or…
e.g. I haven’t finished my homework yet.
5. 情态动词
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。
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. Ken can climb up the tress like a koala.
Tracy could ride a bicycle when she was five years old.
Exercises:
用括号内所给动词的适当形式填空。
1. Listen! The phone __________(ring). Please go to answer it.
2. — Alan, it’s late. Why not go to bed?
— Jenny hasn’t come back yet. I ___________ (wait) for her.
3. — What’s your father doing now?
— He __________ (write) a letter in the study.
Translation.
1.她过去常常周末和朋友看电影。
She used to watch movies with friends on weekends.
2.他习惯于每天晚上睡前看报纸。
He is used to reading newspaper before sleeping.
用括号内所给动词的适当形式填空。
1. The third soccer game_______ (hold) in June.
2. A strange noise __________ (hear) by his mother last night.
3. A new hospital _________ (build) in that city by those people next year.
4. I _________ (live) in Beijing for two years.
5. I _____ never _____ (meet) of that man before.
6. Tom ________________ (study there since two years ago.情态动词练习
1.-- ____ you pass me a pen? I'd like to write down the phone number.
-- Sure. Here it is.
A.Can B.Need C.Might D.Must
2. -- May I go to the cinema, Mum?
-- Certainly, but you ___ be back by 11 o'clock.
A.can B.may C.must D. need
3. you ___ worry about me. It's nothing serious.
A.can't B.mustn't C. needn't D. won't
4. -- Excuse me. Is this the right way to the Summer Palace?
-- Sorry, I'm not sure. but it ____ be.
A.might B.mustn't C.can't D.must
5. The man in the office ____ be Mr.Black, because he went home just now.
A.mustn't B.may not C.can't D.needn't
Translation.
1. 我们不能在教室里吃东西。
2. 首先你必须完成作业。
3. 他现在不可能在家。
4. 她一定知道这个问题的答案。
Activity 4a: Fill in the blanks with the correct forms of the verbs in
Step 3
brackets.
Activity 4b: Fill in the blanks with the appropriate modal verbs from the box.
Activity 4c: Make a list of things that people can do to help the
environment and discuss your list with your partner.
Homework:
Step 4 完成课前预习与课后跟踪练习。
