Unit 6 When was it invented?Section B (3a-Self Check) 课件（28张PPT）

R·九年级上册
Unit 6 When was it invented?
Section B 3a—Self Check
















Review
一般过去时被动语态
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 + 过去分词+ by ...
翻译：他们两年前看过这位老师。
The teacher was visited by them two years ago.
















主动变被动解题步骤：
1. 找宾语 ——
2. 判断宾语的单复数 ——
3. 判断动词的时态 ——
4. 修改谓语的时态 ——
5. 修改原句的主语 ——
即动作的承受者
即be动词的单复数
即be动词的时态
即原句动词改为过去分词
即by + 主语/ 宾语
















be要随着主语变 逻辑主语by来引
1. Tom broke the window.??
The window was broken by Tom.
2. He broke the windows.?
The windows were broken by him.
















3a
Think of something that you do not like to do. Then think of an invention that could help you. Make notes.
? Problem: __________________________
New invention: __________________
What it is used for: ______________
quickly taking notes in class
a special pen
















Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class.
3b
This special pen was invented by Liu Jie.
It has three colors and is used for…
















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(自带) 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
Sample writing
















memory, then assign(分配) 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 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.
















As you pour in your hot drink, the color changes.
Color changing cup
















Smart and creative inventions
It’s then safe for young children to eat the fruit.
It’s convenient.
















计算机在我们的生活、工作中的作用越来越大，你知道计算机的起源与发展吗？请结合计算机的发明时间(1946年）、外形、用途等方面，谈一下它的发展变化，并说明你对未来计算机的畅想。
要求：1.意思连贯，语句通顺；词数不少于80。
练一练
















这是一篇事物介绍类的说明文，根据题目提示可考虑采用下面的模板。
计算机
引出话题
介绍发明
畅想未来
... important in our daily life.
时间:The computer was invented
in ...
外形：... was huge.
用途:send some messages ... open ...
I think computers are going to ...
















Computer
Computers are becoming more and more important in our daily life. Do you know when the computer was invented? The computer was invented in 1946. At that time, it was huge. With the development of science and technology, the computer has grown smaller. Now there are many kinds of computers, such as personal computers and laptops. The computer is a very useful tool in our life.
【参考范文】
















For example , it can send some messages to foreign friends by e-mail. What’s more, it can share information with others through the World Wide Web. We can also listen to music or play the game on computers. It makes us relax.
It’s hard to imagine what our life would be like without computers. I think computers will be more convenient and they are going to change our life completely in the near future.
















Self Check
1 Complete the passage with the correct forms of the
words in the box.
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
invent
















______________. So some people _________ whether the inventor came up with the idea himself or herself. 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.
all of a sudden
doubt
websites
mention
















2 Rewrite these sentences using the passive voice.
1. Someone stole my watch.
2. They used five eggs to make this big cake.
3. When did they invent the personal computer?
4. They asked us not to run in the hallway.
5. Someone took the video back to the store.
















1. Someone stole my watch.
2. They used five eggs to make this big cake.
My watch was stolen by someone.
Five eggs were used to make this big cake by them.
















3. When did they invent the personal computer?
4. They asked us not to run in the hallway.
5. Someone took the video back to the store.
When was the personal computer invented?
We were asked not to run in the hallway by them.
The video was taken back to the store by someone.
















3 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年， 富超穎 (中国)
















scooter carriage (滑板婴儿车) 2007年
Valentin Vodev (奥地利)
















Exercise
Ⅰ. Fill in the blanks with the correct form of the given
verbs.
The first paper __________ (make) in China in 105 AD.
In 610, papermaking ______________ (introduce) into Japan.
was made
was introduced
3. Kites ___________ (know) in China about 3,000 years
ago.
were known
















4. Wheelbarrows (独轮手推车) _____________ (invent)
in the Han Dynasty.
5. Gunpowder(火药) ______________ (discover) by
the Chinese hundreds of years ago.
6. Soccer _____________ (develop) in England in the
12th century.
were invented
was discovered
was developed
















Ⅱ. 按要求改写下列各句。
1. We planted these trees in 1997. (改成被动语态)
________________________________________
2. He made a cake yesterday. (改成被动语态)
________________________________________
3. The teacher gave the students some advice. (改成被动
语态)
______________________________________________
These trees were planted (by us) in 1997.
A cake was made by him yesterday.
Some advice was given to the students by the teacher.
















4. He was seen to read a book in his room. (用I作主语,
改为主动语态)
___________________________________________
5. She was helped by all the people.(改成一般疑问句)
____________________________________________
I saw him read a book in his room.
Was she helped by all the people?
















Ⅲ. 完成句子。
1. 在200多个国家中，超过一亿人打(篮球)，包括中国。
_______ _______ _______ by _______ _______ 100
million people in over 200 countries including China.
2. 篮球是由加拿大一位叫詹姆斯·奈史密斯的博士发明的。
Basketball _______ __________ _______ a Canadian
doctor named James Naismith.
It
is
played
more
than
was
invented
by
































3. 人们认为，历史上的首次篮球赛是在1891年12月21
日举行的。
_______ ____ _________ that on December 21st,
1891, the first basketball game in history was played.
4. 从那时起，篮球在世界各地的普及程度得到提升。
Since then, the popularity of basketball _______
_______ worldwide.
It
is
believed
has
risen