Unit 6 When was it invented Section A 1a -2c 导学案 人教版九年级英语全册

九年级全册
Unit6 When was it invented
【学习目标】
本单元围绕“发明”这一话题，学习了解一些重要发明的历史，教学一般过去时的被动语态。
Section A的重点是培养学生运用被动语态的意识，掌握更多的动词过去分词形式。
Section B依然围绕发明创造这个话题，要求学生继续学习巩固相关的内容和语言知识。同时让学生学习使用思维导图，以加深对文章的理解和对知识的记忆。
【重点难点】
一、重点
1.掌握本课时重点单词，短语和句型。
2.学会一般过去式的被动语态。
二、难点
明白主动语态与被动语态的区别，并能正确使用一般过去时的被动语态。
Period 1 Section A (1a-2c)
【课前任务】
一、核心单词
1.style n. ____________2. project n.____________ 3.pleasure n. ____________ 4. website n._________
5.mention v._________ 6. pioneer n. ___________ 7.list v./ n.___________
二、常考短语
1.the of the shoes 鞋的款式
2.in our 在我们的日常生活中
3. electricity靠电运作
4.be for 被用作……
三、典型句子
1. 我认为你没道理，让我再考虑考虑。
I don’t think ____________________ . Let me think it over again.
2.有特殊鞋跟的鞋子是用来改变鞋子的样式。
The shoes with special heels are used for changing_________________the shoes.
3.在我们的日常生活中，水和空气最重要。
Water and air are the most important things_________________.
4.-------这台机器怎么运作？ --------它靠电力运行。
-------How does this machine work
-------It _________________.
【课中任务】
一、持续默读（SSR）词数：274 建议阅读时间：(T1m,S5m)
Scientists in Britain and the United Sates have made a new kind of enzyme(酵素) that eats plastics(塑料). With its help, plastics can be turned into smaller parts and go away quickly. Scientists believe that, in the future, it could solve the problem of plastic pollution.
The enzyme is able to break down PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can remain in the environment for many years and pollute large areas of land and water. So it has always been a headache to deal with the waste from PET and other plastics.
The researchers made the discovery(发现) while examining the structure of a natural enzyme in Japan. They found that the natural enzyme was helping to break down PET plastics. So, they decided to make small changes to the enzyme by adding some amino acids(氨基酸). It made the natural enzyme’s plastic-eating abilities work faster and better.
John McGeehan, one of the lead researchers, said, “We’ve made an improved enzyme. It’s better than the natural one. And we are trying to make more improvements to it.” He went on, “The enzyme is not harmful to humans or animals, and it is friendly to the environment. So we are considering putting it into wider use.”
The team is now trying to make the enzyme break down PET in large quantities(大量地). “We’ll see that the plastic pollution may be stopped with this technology. However, there is still a long way to go,” John McGeehan added.
1.Circle the key words.
2.Underline the useful sentences.
3.Say something about the passage.
____________________________________________________________________________________________________________________________________________________________________________________
二、课中导学
Step1 Leading in(T2m,S2m)
1．Greeting:Greet the class . Then look at a picture and discuss:
What are they
What are they made of
What invented sky lantern
2．Ask and answer in pairs:Show pictures of the things.Discuss with the students，like this：
A:What was…invented It was invented in…
B:Who invented it It was invented ….
3．T：Today we are going to talk about these inventions.
Which one of these inventions was invented first？Can you guess
Step2 Work on 1a（T1m,S1m）
Look at the things below. In what order do you think they were invented Discuss them with your group. Then number them [1-4].
Step3 Listening :Work on 1b. (T2,S3m)
1.Look at these inventions. Do you know when they were invented.
2.Listen and match the inventions with the dates.
_____ 1876
_____ 1885
_____ 1927
_____ 1971
3.Play the recording once more and students read after the teacher.
Step4 Work on 1c. (T1,3m)
1.Student B, cover the dates. Student A, ask Student B when the things in the picture in 1b were invented. Then change roles and practice again.
Example: A: When was the telephone invented
B: I think it was invented in 1876.
2.ask and answer:There are many kinds of modern inventions. Can you say some out
Step5 Listening :Work on 2a & 2b (T2,S2m)
1.Listen and number the inventions [1-3] in the order you hear them. (2a)
2.Look at these creative inventions. What are they What are they used for Let’s listen.(2b)
3.Complete the chart.
Step6 Post-listening (T1,S2m)
The second invention is a hot ice-cream ______. It runs on ____________ and becomes hot. It’s ______ for serving really _______ ice-cream.
The last invention is shoes with special _____. People can move the heels _____ and ______. You can _____ the heels if you are going to a ______ or ______ them if you are just going out for _________.
Step7 Work on 2c. (T2,S3m)
Make conversations using the information in 2b.
Example: A: What is this called in English
B: It is called a car.
A: When was it invented
B: It was invented in 1885.
A: Who was it invented by
B: It was invented by Karl Benz.
A: What is it used for
B: It is used for traveling.
Step8 链接新知 (T3m,S1m)
I think the TV was invented before the car. 我想电视是在汽车之前被发明的。
【解读】句中invent 作动词，意为“发明”，指发明以前从来未存在过的东西。was invented 是一般过去时的被动语态，结构为was/were + 及物动词的过去分词。
【举例】（1）Edison invented the light bulb in 1879. 爱迪生在1879年发明了电灯。
（2）The light bulb was invented by Edison in 1879. 电灯是在1879年被爱迪生发明的。
（3）Such books are written for children. 这类书是为儿童写的。
【练习】根据中文完成句子。
蔡伦发明了造纸术。
Cai Lun the making.
计算器是在1971年被发明。
The calculator 1971.
2. They are used for seeing in the dark.
be used for doing sth.表示“被用来做某事”。与be used to do sth. 同义。
表示用途、目的。
e.g. （1）This computer is used to control all the machines.
这台电脑是 用来控制所有机器的。
（2） Do you know what this tool is used for
你知道这个工具是用来做什么的
3. Think about how often it’s used in our daily lives.
think about 表示“考虑，想起”。
e.g. （1） He is thinking about travelling in the summer holidays.
他正在考虑暑假旅游的事。
（2）She was thinking about her childhood days.
她正回想她的童年时期。
【拓展有关think的短语】
think of 指“考虑, 记忆, 记起”
think sth. over指“仔细想, 审慎思考, 作进一步考虑”
Step9 随堂检测 (T2m S5m)
一、根据汉语提示完成单词。
1. That’s the most _________ (有用的) book.
2. It is said that Thomas Edison had 1,093___________ (发明) during his lifetime.
3. — What is this kind of machine used for
— It’s used for _____________ (听) to music.
4. If you _________ (加热) the ice, it will soon become water.
5. I don’t know televisions ________________(发明) Bell.
二、Complete the dialogue
A: Look! This looks so interesting!
B: Ah, it’s a great invention of China.
A: Really When ______ it _________
B: I think it ______ _________ in Han Dynasty. (汉朝)
A: What ______ it ______ for
B: Guess!
A: ______ it ______ for holding water
B: No. It _____ ______ for testing earthquakes.
A: Wow, it’s really amazing!
Step10 Summary (T1m)
重点词组：1.be used for 2. the style of 3. run on
重点句型：
1.When was ... invented
It was invented in...
I think... was invented before/after…
2. What is/are ... used for
It is/they are used for ...
重点语法：
1.一般过去式的被动语态：was invented in/by...
2.be used for doing sth.
【课后任务】
一. 根据句意及首字母提示完成单词
1. We'd better make a l____ before going to the supermarket.
2. ---Thank you for showing us around the radio station.
---Don't m ____ it.
3. In order to save e ____ , we turned off the light.
4. He is the p____ in the field of science. His ideas are always surprising.
5. P____ Hope has helped thousands of poor children in China in the past 27years.
二.阅读理解
The excellent mother and daughter
优秀的母女
A mother and her daughter recently graduated from the medical school and they will work together at the same hospital.
Cynthia Kudji and her daughter Jasmine attended the medical school at the same time, although miles apart from one another. Cynthia graduated from the University of Medicine and Health Sciences in St. Kitts while Jasmine graduated from Louisiana State University School of Medicine in New Orleans.
They were excited to receive the news that they would work at the same hospital. They are the first mother and daughter due to attend the medical school at the same time and work at the same hospital.
Cynthia dreamed of becoming a doctor. At the age of 43, she decided to pursue her medical degree. They said the road hadn’t been easy but they were glad to have finally completed a major part of their journey. After their challenging journey, Cynthia and Jasmine said they were excited to begin the next phase of their careers.
Jasmine said, “I think the medical school is one of those experiences that you don’t truly understand until you’re in it. Sometimes people struggle to find someone who relates to their struggles. I think my mom is just that person.”
1. Which of the following is NOT true
A. Cynthia and Jasmine attended the same school.
B. Cynthia and Jasmine are glad to work at the same hospital.
C. Cynthia and Jasmine have graduated from the medical school.
D. Cynthia dreamed of becoming a doctor.
2. When did Cynthia make up her mind to pursue the medical degree
A. At the age of 23. B. At the age of 32. C. At the age of 34. D. At the age of 43.
3. What do you think of Cynthia
A. Selfish. B. Positive. C. Warm-hearted. D. Helpful.