Unit 6 When was it invented? Section B 3a-Self Check课件(共20张PPT)人教版九年级全册

(共20张PPT)
When was it invented
Section B
3a-Self Check
Unit 6
Color changing cup:
As you pour hot water into the
cup, the color of the cup changes.
Smart and creative inventions
before pouring into
hot water
while pouring into
hot water
after pouring into
hot water
You can never chop your fingers off anymore.
Smart and creative inventions
It’s safe for young children to eat them.
Smart and creative inventions
Problem: _________________________
New invention: ____________________
What it is used for: __________________
Think of something that you do not like to do. Then think of an invention that could help you. Make notes.
a special pen
quickly taking notes in class
taking notes in class
Now it’s your turn!
3a
Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class.
This special pen was invented by Liu Jie. It has three colors and is used for…
3b
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（微芯片） 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, and then assign a short form to each word. When you are writing, you just need to write the short forms with the pen and press a button on the pen and then all the short forms will change into the actual words. The microchip can contain nearly 50 words and you can make changes to the list of words whenever you need to.
Sample writing
将有6位同学扮演“推销商”上台向同学们“推销”自己的发明，台下的每位同学都有一张选择票，得票最多的“推销商”获胜。
（注：在“推销”发明时需全程使用英语。）
谁的发明最畅销？
Self Check
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 ______________.
Complete the passage with the correct forms of the words
in the box.
invent
all of a sudden
1
invent doubt mention website all of a sudden
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.
doubt
websites
mention
invent doubt mention website all of a sudden
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.
______________________________________________
My watch was stolen by someone.
Five eggs were used to make this big cake.
When was the personal computer invented
We were asked not to run in the hallway.
The video was taken back to the store by someone.
Rewrite these sentences using the passive voice.
2
Find out information about an invention you would like to know more about and write sentences below.
Invention: _____________________________
When: ________________________________
Who: _________________________________
Purpose: ______________________________
3
Exercises
1. 错误地
2. 偶然
3. 根据……；按照……
4. 用这种方法 　　
5. 用来做…… 　　
6. 足够咸
7. 一个古老的中国传说
8. 把……分成
by mistake
by accident
according to …
in this way
be used for…
salty enough
an ancient Chinese legend
divide ... into
一、写出下列短语的英文表达。
二、单项选择
1. My mother told me that my homework must ____ on time.
A. finish B. be finish
C. be finished　 D. finished
2. The number of teachers in our school ____ 60 and a number
of them ____ male teachers.
A. is; are B. are; is
C. am; are D. be; are
C
A
3. If it ____ tomorrow, we ____ go to the park.
A. rains; won’t B. will rain; won’t
C. rains; don’t D. will rain; will do
4. All the books will ____ to the children who live in the small village.
A. be sent B. sent 　C. be send　 D. send
5. —Do you know the lady____ is interviewing our headmaster
—Yes, she is a journalist from CCTV.
A. which B. who　 C. whom　 D. whose
A
A
B
三、根据中文提示完成句子。
1. There were many famous _________ (发明) in ancient China, and paper was one of them.
2. I don’t like this kind of potato chips because they are not _______ (脆的).
3. Silk is _________ (生产) in Hangzhou.
4. The conductor kept ________ (提供) us hot water on the train.
inventions
crispy
produced
offer
Homework
Review the unit. Write about an invention
you are interested in.
Thank you!