Unit 6 When was it invented Section B 3a-Selfcheck 课件(共22张PPT)人教版九年级全册

(共22张PPT)
Unit 6
Unit 6
When was it invented
能正确使用本单元的词汇、句式及被动语态谈论发明
能根据写作要求，完成一篇介绍发明的文章，表达自己的观点和看法
完成Self check中的任务，培养自我反思和评价的能力
1. 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
Can you think of more details about this pen
What does it look like
What is it made of
What special things does it have
How can it help you
2. Problem: ___________________________
New invention: ______________________
What it is used for: __________________
a special clock
getting up early
waking me up
Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class.
How to introduce an invention
who
when
where
how
what
why
invention
内容：介绍一项新发明 文体：说明文
人称：以第三人称为主
时态：以一般现在时为主
【审清题目】
1. It was invented in ... / last ... / ... weeks / months / years ago.
2. It was invented by ...
3. It’s made of ...
4. It looks like ...
5. It is ... meters tall and weighs ... kilograms.
6. It can be used to ...
7. It is used for ...
8. It can help ... (to) do ...
9. It is easy / convenient / ... for ... to do ...
【常用句型】
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 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.
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.
invent, doubt, mention, website, all of a sudden
1. Complete the passage with the correct forms of the words in the box.
invent
adv. 几乎
nearly可修饰数词、动词、形容词等, 通常位于被修饰词之前。
Some inventions can also lead to other inventions _____________. 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
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).
When was the personal computer invented
Five eggs were used (by them) to make this big cake.
2. Rewrite these sentences using the passive voice.
The video was taken back to the store (by someone).
We were asked not to run in the hallway.
Invention: _________________________
When: _________________________
Who: _________________________
Purpose: _________________________
3. Find out information about an invention you would like to know more about and write sentences below.
根据语篇内容, 用方框中所给词的正确形式填空，使短文通顺、连贯。方框中有两个词为多余项。
doubt, pioneer, tool, customer, list, trade,
shape, low, nearly, mention, remain, daily
You often use staplers (订书机), don't you They're a useful (1)_______ used by people all over the world, whether you're in the office, at home or at school.
tool
doubt, pioneer, tool, customer, list, trade,
shape, low, nearly, mention, remain, daily
It is said that the first stapler in the world has a history of (2)_______ three hundred years. It appeared in France and was used by the French king (国王) Louis XV in the 18th century. From then on, many (3)________ started to improve staplers from time to time and George W. McGill was one of them.
nearly
pioneers
doubt, pioneer, tool, customer, list, trade,
shape, low, nearly, mention, remain, daily
George W. McGill worked hard and succeeded in making his staplers popular with (4)__________. In 1866, he got his first US patent (专利). Later, he continued to improve his staplers and got another US patent. His staplers were small, light and easy to use, while others' (5)_________ heavy and difficult to use. As a result, the (6)_______ of his staplers developed very quickly. What's more, his staplers were sold at a(n) (7)_______ price.
customers
remained
trade
low
doubt, pioneer, tool, customer, list, trade,
shape, low, nearly, mention, remain, daily
Today staplers can be seen everywhere. They come in all different (8)_______ and sizes. They're used more and more widely in people's (9)__________ lives. There is no (10)________ that they will continue to play an important role in the future.
shapes
daily
doubt
1. Polish your writing.
2. Finish Activity 3 on page 48.