冀教版九年级下册英语《Lesson 11: Cloning People?》精品教案

桂馥兰香

Lesson 11: Cloning People?
Teaching Content:
Mastery words and expressions: exactly, divide, crazy
Oral words and expressions: human being, original, adult, Dolly, insect
Teaching Aims:
1.Know more about cloning.
2.Create the students’ spirit of cooperation.
掌握的词汇及短语
exactly, divide, crazy
识别的词汇短语
human being, original, adult, Dolly, insect
Teaching Important Points:
1.The advantages and disadvantages of cloning.
2.The expression of ability and disability.
3.The use of coordinating conjunctions.
Teaching Difficult Points:
The advantages and disadvantages of cloning.
Teaching Preparation: pictures
Teaching Aids: flashcards, audiotape, pictures
Type of lesson: new lesson
Teaching Procedure:
Step1: Show a picture of Dolly. Then let the students discuss what our life will be if we make a clone of ourselves.
Divide the class into groups of three or four. Discuss for five minutes. Then present their results to the class.
Step2. Listening task:
Listen to the tape and fill in the blanks with the correct words you hear.
1.The clones are the ______ height.
2. There are ______ ways to clone people.
Finish the task in class in oral.
Step3. Reading task:
Read the text and decide whether the following statements are true (T) or false(F).
1.We can make clones from dead animals.
2.Each clone would be a different person.
3.We can combine the DNA of pigs and dogs.
Finish the task in class in oral.
Step4. Pair work:
Read the text again and find more details about the text. Try to solve the following problems. Talk about them with your partner. At the same time, encourage them to ask more questions about the text.
How many ways are there to clone people? What are they?
Do you want a clone of your self? Why?
What is the use of cloning?
Try to finish it in a limited time in order to improve their comprehension ability.
二、重点语句分析：
1. What if scientists could make clones of human beings? 如果科学家们会制造克隆人将会怎样？
human一词的用法
human用作名词表“人类”意义时相当于human being，a human指“一个人”，它的复数形式是humans，而human being的复数形式是human beings。
【辨析】：human being, man与mankind
human being及human指区别于动物或上帝的“人”，该词常和animal同时出现在句中，形成对比。
man一般以单数形式出现（现在也有人以复数men表示“人类”）其前无任何限定词。
mankind前也不可以加人和限定词，但可用形容词修饰。它是集合名词，作单数或复数用，谓语动词的数及其对应的代词酌情处理。
They are not the bones of an animal, but of a human being’s. 它们不是动物的骨头，而是人的骨头。
Men is fighting a battle against pollution. 人类正与污染作斗争。
Men today face a struggle for survival.人类当前正在进行生存斗争。
Mankind is much clever than it was a thousand years ago. 人类比1000年前聪明多了。
All progressive mankind love peace. 所有进步人类都爱好和平。
2. After a person or animal has died, we cannot clone them. 一个人或动物死了之后，我们就不能克隆他们了。
die 是动词，意思是“死，死亡”，是一个瞬间动词，不能与一段时间连用。
My grandpa died two years ago. 我爷爷两年前就去世了。
The old man died of cancer. 那位老人死于癌症。
The fish will die without water. 离开水鱼会死去。
【拓展】：
a. death是名词，意思为“死亡，去世”。
The memorial hall was built one year after his death. 他死后一年，纪念馆建成了。
His death is a great loss to us. 他的死是我们的巨大损失。
b. dying是die的现在分词，用作形容词，意思是“垂死的，即将死去的”。
The doctors have saved the dying man. 医生们救活了那个垂死的人。
The poor dog had no food, it was dying. 可怜的狗没有食物，快要饿死了。
The dying father wanted to see his son. 那个垂死的父亲想见见他的儿子。
c. dead adj. 意思为“死了的，无生命的”，表示状态，可以与一段时间连用。
The tree has been dead for ten years. 这棵树死了有10年了。
The rabbits are all dead. 这些兔子都是死的。
She looked at her dead cat sadly. 她伤心地看着她死去的猫。
2.We can divide a growing egg in half. 我们能把一个活卵子分成两个。
1) divide vt.& vi.（常与in, into连用）分开，划开
Let’s divide ourselves into several groups. 我们分成几个小组吧。
How shall we divide up the labour in the work? 我们怎样分工？
This class is too large; we shall have to divide it for oral practice. 这个班级太大，我们必须分开做口语练习。
【注意】：
divide和separate这两个词都有“分开”的意思，但含义和用法都不太相同。divide指的是把人或物分成若干等分，常与介词into连用；separate指的是将一个整体的物品分开或将两个靠近的物品分开，使其不在一起，常与介词from连用。
Let’s divide these books into ten parts. 我们把这些书分成10份吧。
A fence separated the cows from the pigs. 围栏把奶牛和猪分开了。
2)英语中的“一半”是a half。但如果说“一半的……”，也就是说如果后接一个名词时，则多用half a+名词。
【拓展】：
half a kilo 0.5千克
half a day/week/year半个/半个星期/半年
half an egg/apple半个鸡蛋/苹果
half a kilo of bread/bananas /meat千克的面包/香蕉/肉
a. one and a half后面习惯接复数名词
The film lasted one and a half hours. 这场电影演了一个半小时。
b. half of之后接单数名词（代词宾格）是谓语用单数；若接复数名词（代词宾格）位于用复数。
Half of it is good. 那一半是好的。
Half of them are good. 那些的一半是好的。
c. two hours and a half多用于口语；two and a half hours多用于书面语，均为“2.5”个小时。two and a half之后要跟复数名词，单数动词。如：
Two and a half hours passes quickly. 2.5个小时过得很快。
从上下文看，当half作为名词单数表示一系列的可数东西时谓语动词用复数。如：
Half are eaten by himself. 他自己吃了一半。
4.It may let scientists find new ways to help sick people. 这也许能帮助科学家们找到帮助病人的新方法。
sick和ill都是形容词，表示“生病的”，但二者无区别：ill只可用作表语；而既可作表语，也可做定语。
He is ill/sick in hospital. 他生病住院了。
He is a sick boy. （正）
He is an ill boy. （误）
这男孩生病了。
【注意】：
sick, ill都作“病了”解，但英国人多说ill，美国人多说sick。说患病，人是sick或ill都可以，但动植物一般是sick而不是ill。此外，ill一般不会用在名词之前。
5.I think it would be fun to have a twin, but I don’t think I would want to be cloned! 我认为有个双胞胎会很有趣，但是我认为我不想被克隆。
当think, believe, expect, suppose, imagine等表示看法、意见的动词后接含not的宾语从句时且主句主语为第一人称，习惯上把not移到主句之中，构成否定转移。如：
I don’t think that she is interested in maths. 我认为她对数学没有兴趣。
I don’t think it’s necessary for them to buy so big a house. 我认为他们没有必要买那么大一座房子。
6.What kind of DNA are they wearing? 他们带有哪种DNA?
【辨析】：wear, put on与dress
wear表示“穿，穿着”“戴，戴着”，强调状态。
put on表示“穿上，戴上”，强调动作。
dress表示“穿衣”，其宾语是表示人的名词，而不是表示衣服的名词。
He always wears a hat. 他总是戴着一顶帽子。
Put on your glasses if you can’t see clearly. 看不清的话，就戴上眼镜。
She dressed herself in a red coat. 她穿上一件红色大衣。
7.What else have scientists designed by changing DNA? 通过改变DNA，科学家们还设计了其他的什么东西？
else的用法
else表达“其他的，其余的”的含义，通常用在不定代词（something, anything, nobody, somebody, nothing等）获疑问代词（what, which, who等）之后。
Do you want something else? 你还想要点别的吗？
He is full and needs nothing else. 他吃饱了，别的什么也不再需要了。
I am the only person here; there is nobody else. 只有我在这儿，再没别人了。
What else do you want? 你还想要什么？
Who else will be here? 还有谁会来？
【友情提示】：
else与other都可以表示“别的”。但是other修饰名词，位于名词的前面；else修饰不定代词、疑问代词或疑问副词，必须位于这些词之后。
What’s that in the other hand? 另一只手里拿着什么？
Do you have anything else to say? 你还有别的事情要说吗？
Who else can play the piano? 还有谁会弹钢琴？
8.One group agues for an idea; the other argues against it. 一个小组赞成一个观点；另一个小组反对一个观点。
argue for赞成，其反义词组是argue against（反对）
Do you argue for their plan or (argue) against? 你赞成他们的计划还是反对他们的计划？
(1) living things  生物               (2) two different plants.  两种不同的植物

Step5. Read the text by the students. Give the students time to listen to the tape again. Then make a chance for them to practice in front of the class.
Step6. A debate
Divide the class into two groups. One group is for the advantages of cloning. The other is for the disadvantages of cloning.
The teacher designs the task in order to find out the meanings of cloning.
Step 7.Come to “LET’S DO IT’.
This task is similar to the one is step6. This topic is about the food. The students can use their imaginations. Of course the best way is to search on the Internet for more information about the subject.
Step8. Homework
1.Search more information about cloning on the Internet or in the newspaper.   
2,Finish off the exercises in the activity book.
Summary:
Cloning is a popular subject in the modern society. It is good for the students to know more about that. Encourage the students to find out more information on the Internet. They can use other tools to get more. Give them chances to present their results in the next lesson.
练习
Ⅰ. Fill in the blanks with proper prepositions or conjunctions:
1.What if scientists could make clones ___ human beings?
2.But would they be exactly the same _____ the original humans?
3.______ some ways, clones would be exactly the same.
4.We can divide a growing egg _______ half.
5.They divided the class _________ four groups.
6.Some people worry ________ the answer _______ that question.
7. His sweater is good except _______ the colour.
8. Yesterday I lost the key ________ the door.
9. Your DNA is _______ every part of your body.
10. Japanese is quite different ________ English.
11. Many clothes are made _________ cotton.
12. Have you ever seen a pig _________ a dog’s body?
13.  ____ changing the DNA, scientists made stronger  cotton plants.
14.  Scientists say we need to know more ________ DNA before we start changing it.
15. We can make plants that are bad ________ insects.
Ⅱ. Fill in each blank with the proper word from the brackets:
1.What if it __________(rain) tomorrow?
2.Other people think human _________(clone) is okay.
3.Everyone except Jim and John _______ (be) there when the meeting began.
4.Li Lei, together with us ________ (be) playing now.
5.His uncle has been _________(die) for many years.
6.Li Lei is always __________(worry) about his studies.
7.What he said makes me __________(worry).
8.Who is the ________(design) of our new school building?
9. The boy can ______(exact) learn these numbers by heart.
Ⅲ.同义句转换，每空一词：
1.What else have scientists designed by changing DNA?
What _______ _______ have scientists designed by  changing DNA?
2. The computers are made in Japan. They sell well.
  The computers _________ ____  _____ in Japan sell well.
  The computers ________ in Japan sell well.
3. We can only make clones from living DNA.
  We can only make clones ______ ______ living DNA.
4. It may let scientists find new ways to help people who  are ill.
  It may let scientists find new ways to help _____ _______.
5. You can divide the apple in half.
  You can divide the apple _______ ________.
Ⅳ.根据汉语意思完成句子，每空一词：
1.在某些方面，我们可以帮助别人。
  ____ ______ _______, we can help other people.
2. 许多衣服是棉布做的。
  Many clothes _______ _______ _______ cottons.
3. 我们可以培植对昆虫有害处的植物。
  We can make plants that ______ _____ _______ insects.
4. 科学家能从一种植物中提出DNA，并把它放入另一种植物。
   Scientists can _________ DNA __________ one kind of
   animals and _______ it _______ another kind of animal.
5. 通过DNA，科学家能鉴别你和与你有关的人。
   From your DNA, scientists can identify you and people
      _______ _______ you.
6. 我们在北京西客站换了火车。
   We _______ ________ at Beijing West Railway Station.
7. 她的毛衣和我的颜色一样。
   Her sweater is ______ _______ _______ _______mine.
8. 我们分成几个小组讨论我们的计划。
   We _________ ourselves ________ several groups to
   discuss our plan.
9. 我们若是开会迟到了又有什么关系呢？
   _______ _______ we are late for the meeting?
10. 但是他们和原来的人完全一样吗？
    But would they be _________ the same as the original