Unit 4 Topic 1 When was it invented? Section C课件 (共19张PPT，内嵌音视频)2024-2025学年英语仁爱版九年级上册

(共19张PPT)
Unit 4 Topic 1
When was it invented
Section C
能熟悉并正确运用本课时的重点单词和短语
能掌握一般过去时的被动语态
能用英语谈论各项发明创造及其步骤
学习目标
Pre-reading
List some inventions that you know.
inventions
新课讲授
Work in groups and discuss the questions before reading.
What is an invention
invention n.发明，创造
invent v. 发明，创造
inventor n. 发明者，发明家
An invention may be a new product or a new way of doing things.
2.List some inventions that you know and their inventors.
computer lock television light bulb chopsticks crayon …
3.Do you think you can be an inventor Why
Yes, inventing is interesting and exciting and everyone can be an inventor.
Work in groups and discuss the questions before reading.
v.列清单，把…列表
What is an invention
How to make an invention
Inventing is interesting
Listening
Listen to 1a and choose the best answer:
What's the main idea of the text
invention
crayon
thought
silly
brainstorm
evaluate
redesign
detailed
愚蠢的，傻的
发明，创造
彩色铅笔
想法，看法，主意
集思广益，动脑筋
重新设计
估值，评价，评估
详细的
Read 1a, match the words with their meanings.
1b
Read 1a and put the sentences in the correct places .
A. Draw your invention. B. Name your invention.
C. Test your invention. D. Use your imagination.
E. Plan and design your invention.
___ You can have wild and crazy thoughts. Remember that no idea is too silly. Many people laughed at the Wright brothers and said they would never fly. But they weren’t discouraged by what people said. That’s why now we have planes.
D
_______ Careful planning is important in the invention process.
This is the time to brainstorm for ideas and to evaluate them.
_______ Make a detailed drawing of your invention so others will
understand how your invention works.
Make a model of your invention.
_______ See if your invention works as it is planned . If not, do
more research, redesign it, and test it again.
_______ Every invention needs a name.
Share your inventions with others.
E
A
C
B
1b
Read 1a and put the sentences in the correct places.
When you want to have an invention , first you must use your __________. Then you should plan and design it.Careful planning is very ___________ in the invention. Third, you should make a _________ drawing of your invention and make a model of it. If you want to make your invention more successful, you must _____ it again and again. After that, you ______ your invention. Last, remember that you should _____ your invention with others.
imagination
important
detailed
test
name
share
Read 1a again and fill in the blanks.
1c
1.This is the time to brainstorm for ideas and to evaluate them :这时候应该多想主意，并对他们进行评估。
This is the time to do ....这是做...的时候
例： This is the time for you to study English hard.
这时候你该努力去学英语了。
Language points
2. Instead of writing letters on paper,people communicate by sending e-mails and chatting online 人们通过发邮件和网上聊天来保持联系，而不是在纸上写信。
Instead of: 代替，而不是，相反的【其后常接宾语，宾语由名词，代词，介词，短语，动词+ing形式充当】
例： We’ll ask li Mei instead of Mary 我们将去问李梅而不是玛丽
例： I’ll go instead of her 我会替她去。
Watch the flash of 1a.
balloon
gun
robot
keyboard
candy
computer
medicine
lock
scissors
spaceship
zero
chopsticks
light bulb
television
X-ray machine
2
Discuss with your partner which of the followings are the top 3 most important inventions and which is the least important invention. Then explain your choice to the class.
candy ---
medicine---
gun ---
lock ---
spaceship---
chopsticks---
keyboard ---
television ---
X-ray machine---
computer---
balloon ---
robot ---
scissors ---
zero ---
light bulb---
by an Egyptian
by Chinese
by a Chinese
by an American
by Russians
by Chinese
by an American in 1714
by an Englishman
by a German
by an American
by Frenchmen
by an American
by an Egyptian
by an Indian
by Edison
Example: I think zero is the most important invention. It is said that it was invented by an Indian. It is a very interesting number. For example, I have only ten yuan. If you add five zeros after it for me, I will be a rich man.
Discuss with your partner which of the followings are the top 3 most important inventions and which is the least important invention. Then explain your choice to the class.
2
Do you know how to be an inventor Do you want to invent something Write a passage about your invention. The following questions may help you .
1. How do you come to the idea of your invention
2. What does it look like
3. What is it made of/from
4. What’s it used for
5. What are you going to name it
Before writing, think more clearly and tell about the looks, uses, advantages and disadvantages of an object.
3
My invention is a robot. It is called “Superman”. There is a computer inside its body. It looks like a tiger. When you see it for the first time, you may be frightened. In fact, it is gentle and polite. It can help us do housework, such as cleaning a room, washing dishes, and making the bed. When the room is dirty, it will begin to work at once. It can also watch over a house instead of humans. It is careful, clever and hard-working. In short, this robot is very useful to us, though it can’t run or speak.
You can write it like this:
We learn : 1.Some words: invention, crayon, thought,
silly, balloon, gun, robot, keyboard
2.Some phrases: laugh at，come come out，
the result of …， none of …
3. Some sentences:
Inventing is interesting and exciting and everyone
can be an inventor .
We can : 1. Talk about the process of an invention.
2. Write a passage about an invention.
课堂总结
Recite 1a.
2. Write a passage about your invention.
Homework