（新课标）Unit 6 When was it invented？SectionB(3a-Selfcheck）课件（共31张ppt)

(共31张PPT)
人教版2022-2023年度九年级英语全册同步课件
Unit 6 When was it invented？
SectionB（3a-Selfcheck）
Learning objectives
1.Talk about the history of inventions
2.Write a description of a new invention.
3.Review the passive voice in past tense
How many inventions have been mentioned in this unit
computer
car
zipper
T V
telephone
basketball
tea
potato chips
Lead in
Inventions are everywhere in our life.
bike
ball pen
robot
toothbrush
3a
Think of something that you do not like to do. Then think of an invention that could help you. Make notes.
Problem: quickly taking notes in class
New invention: a special pen
What it is used for:
What is your problem
Emm, I have to take notes quickly in class, but I can follow the teachers most of the time.
Exchange your chart with your partner and discuss it.
So what do you want to invent
…
3b
Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class.
Try to tell us the following information:
What is it made of
What is it used for
What does it look like
Where or when can it be used
How much will it cost
How to introduce an invention
3
4
1
5
who
how
at the same time
although
because...
in order to...
so that...
There be...
color,shape,size,use
what
why
invention
2
when
in+ 年份
on+月，日，年
...was/were invented by...
...invented...
who
when
why
what
how
3b
This special pen was invented by Liu Jie. It has three colors and is used for_____ _________________________________________________________________
_________________________________________________________________
_________________________________________________________________.
Write it like this:
Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class.
Sample writing:
This special pen was invented by Liu Jie. It has three colors and is used for taking notes quickly. It is very useful if you have a lot to write down. The pen comes with a microchip that can store a list of common words that you will use. You can program the words you will use often into the microchip’s memory, then assign a short form to each word. when you are writing, you
just need to write the short forms with the pen, press a button on the pen and all the short forms will change into the actual words. The microchip can contain up to 50 words and you can make changes to the list of words whenever you need to.
本单元以"Inventions"为话题，主要谈论了历史上及生活中的一些重要发明，要求学会介绍某项发明的用途、特点等。该话题常见的命题形式有∶介绍历史上的一项重要发明;介绍你身边的人或你自己的一项新发明。
写作此类话题作文的常用表达有：
It's widely used by people everywhere.它被人们到处广泛使用
There are many modern inventions in our daily life.在我们的日常生活中有许多现代发明
Among all of them,I think ... is one of the most important inventions.在这些发明中，我认为...是最重要的发明之一
because it brings plenty of benefits to people因为它给人们带来了大量的益处。
It makes life convenient by helping us save a lot of time and money 通过帮助我们节约时间和金钱使我们生活更方便。
it is very quick and comfortable它非常快捷和舒适
It is not only convenient but also green.它不仅方便而且环保
thanks to new inventions, the life is getting more and more convenient.由于新发明，生活变得越来越方便
The rapid development of science and technology has brought great changes to our life.科学技术的快速发展给我们的生活带来了巨大改变
It saves us a lot of time and energy.节约了我们大量的时间和精力。
题目：假如你是李华，你的外国朋友Eric对中国的"新四大发明"很感兴趣，特地写信向你询问，请你根据以下信息提示，给他写一封信，向他介绍这四大发明的特点以及它们对生活的影响，并且告诉他自己觉得哪一个发明最有用，阐述理由。
要点：
Four Great New Inventions 四大发明 Features 特点
High-speed train 舒服，快捷，一小时300公里
Online-shoppng 可以在家购物，方便，价格更实惠
Bike-sharing 单车可以在很多地方租用（rent）
Alipay（支付宝） 更加安全、通过手机支付
第一步：仔细审题
1、格式--
2、时态--
3、人称--
4、体裁--
命题作文
一般现在时
第三人称为主
说明文
要点：1.高铁舒服，快捷，一小时300公里2.网购可以在家购物，方便，价格更实惠 3.单车可以在很多地方租用（rent）4.支付宝更加安全、通过手机支付.
要点：1.高铁舒服，快捷，一小时300公里2.网购可以在家购物，方便，价格更实惠 3.单车可以在很多地方租用（rent）4.支付宝更加安全、通过手机支付
第二步：谋篇布局
第一段—
Dear Eric,
In modern China there are four great inventions. You must wonder something about them. Now let me tell you. They are the high-speed train, Alipay, bike-sharing and online-shopping.
引出话题。
要点：1.高铁舒服，快捷，一小时300公里2.网购可以在家购物，方便，价格更实惠 3.单车可以在很多地方租用（rent）4.支付宝更加安全、通过手机支付
第二步：谋篇布局
第二段—
The high-speed train can trave l300 kilometers an hour. And it is very quick and comfortable.Alipay is at type of payment which is very safe.People can use it to buy things by the mobile phone.As for bike-sharing, people can rent bikes anywhere.It is not only convenient but also green.
The last one is online-shopping. Now because of online-shopping, we can shop at home. Online-shopping can also make it convenient and cheap for us to buy something.
介绍新四大发明的特点以及它们对生活的影响。
要点：1.高铁舒服，快捷，一小时300公里2.网购可以在家购物，方便，价格更实惠 3.单车可以在很多地方租用（rent）4.支付宝更加安全、通过手机支付
第二步：谋篇布局
第三段—
In my opinion, the most useful invention is bike-sharing. The reason is that when we use bike-sharing, there will be less private cars, so that we can protect the environment and save the money at the same time. We can also treat it as a way to do exercise.In a word, thanks to the four great new inventions, the life in China is getting more and more convenient.Welcom to China!
Yours,
Li Hua.
讲述共享单车最有用,介绍理由并总结话题。
Sample Writing
Dear Eric,
In modern China there are four great inventions. You must wonder something about them. Now let me tell you. They are the high-speed train, Alipay, bike-sharing and online-shopping.
The high-speed train can trave l300 kilometers an hour. And it is very quick and comfortable.Alipay is at type of payment which is very safe.People can use it to buy things by the mobile phone.As for bike-sharing, people can rent bikes anywhere.It is not only convenient but also green.
The last one is online-shopping. Now because of online-shopping, we can shop at home. Online-shopping can also make it convenient and cheap for us to buy something.
In my opinion, the most useful invention is bike-sharing. The reason is that when we use bike-sharing, there will be less private cars, so that we can protect the environment and save the money at the same time. We can also treat it as a way to do exercise.In a word, thanks to the four great new inventions, the life in China is getting more and more convenient.Welcom to China!
Yours,Li Hua.
一般过去时的被动语态
一般过去时的被动语态表示过去某一时刻发生的被动性动作, 其基本结构为：
主语+ was / were + 动词过去分词+ by...
eg: The teacher was visited by them two years ago.
他们两年前拜访过这位老师。
主动变被动解题步骤
1. 找宾语 ----即动作的承受者
2. 判断宾语的单复数 ----即be动词的单复数
3. 判断动词的时态 ----即be动词的时态
4. 修改谓语的时态 ----即原句动词改为过去分词
5. 修改原句的主语 ----即by+ 主语/ 宾语
invent doubt mention website all of a sudden
It is often difficult to decide on the inventor of certain inventions. This is because sometimes a few people may _________ things which are nearly the same. It’s hard to tell who came up with the idea first. Some inventions can also lead to other inventions________________. So some people __________ whether the inventor came up with the idea himself or herself.
doubt
invent
all of a sudden
Self Check
1. Complete the passage with the correct forms of the words in the box.
adv. 几乎
invent doubt mention website all of a sudden
They think that the inventor used someone else’s idea to create his or her invention. That is why books or ___________ usually _______________ more than one inventor when giving information about inventions.
websites
mention
Self Check
1. Complete the passage with the correct forms of the words in the box.
1. Someone stole my watch.
2. They used five eggs to make this big cake.
3. When did they invent the personal computer
2. Rewrite these sentences using the passive voice.
My watch was stolen (by someone).
Five eggs were used (by them) to make this big cake.
When was the personal computer invented
Self Check
2. Rewrite these sentences using the passive voice.
4. They asked us not to run in the hallway.
5. Someone took the video back to the store.
We were asked not to run in the hallway.
The video was taken back to the store (by someone).
Self Check
Find out information about an invention you would like to know more about and write sentences below.
Invention:___________
When: ______________
Who: _______________
Purpose:_____________
switch plug
(断路插头)
2012，
富超穎 (中国)
scooter carriage
(滑板婴儿车)
2007年
Valentin Vodev (奥地利)
Fill in the blanks with the correct form of the given verbs.
1. The first paper __________ (make) in China in 105 AD.
2. For over 500 years the art of making paper __________ (limit) to China.
3. In 610, papermaking ______________ (introduce) into Japan.
4. Kites ___________ (know) in China about 3,000 years ago.
5. Wheelbarrows ____________ (invent) in the Han Dynasty.
6. Gunpowder _______________ (discover) by the Chinese hundreds of years ago.
7. Soccer _____________ (develop) in England in the 12th century.
was made
was limited
was introduced
were known
were invented
was discovered
was developed
Exercises
Summary
1. Review the words in this unit.
2. Write a passage:
假如你发明的“飞行单车”在学校科技节中获奖，被推荐参加一个国际青少年科技展览。请用英语介绍你的发明， 内容包括下图1-4项。
注意：
（1）参考词汇：轮子：wheel 太阳能：solar power
（2）词数80左右（文章的开头已给出，不计入词数）。
（3）不得透露学校、姓名等任何个人信息。
My invention is a flying bike. ____________________________________________
____________________________________________________________________________________________________________________________________________________________________________________________________________
Homework
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