(共16张PPT)
When was it invented
( Period 1)
Unit 9
What do you think a computer is used for
A computer is used for surfing the Internet.
be used for + (doing) sth.
被用来……
computers
watch movies
send emails
surf the Internet
chat with friends
look up information
…
--- They are used for sending emails / …
--- What are computers used for
play computer
games
The history of computer development
When was it invented
The calculator was invented
in 1971.
Sir Clive Sinclair
The note PC was
invented in 1981.
Steve Wozniak
The personal computer
was invented in 1976.
Jef Raskin
inventions
inventors
In what order(顺序)were they invented
The calculator was invented before the personal computer.
The personal computer was invented after the calculator.
The note PC was invented after the personal computer.
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The calculator was invented by Sir Clive Sinclair.
The personal computer was invented by Steve Wozniak.
The note PC was invented by Jef Raskin.
Who was it invented by
A: I think the computer is the newest.
B: I think the telephone was invented
before the car.
C: Well, I think the telephone was
invented after the car.
In what order do you think they were invented
Report: In our group, we think the … is the first invention, … is the second invention…
Listen and match the inventions with the dates.
1b
_____ 1876
_____ 1885
_____ 1927
_____ 1971
_____ 1976
Listening
Alice
____ was invented in ____.
e
a
c
b
d
A: When was the … invented
B: It was invented in _____.
1976
1927
1876
1885
1971
Baird (约翰·贝尔德 )
Bell (亚历山大·贝尔 )
Wozniak and Jobs (沃兹奈克和乔布斯)
Sinclair (克里夫·辛克莱)
Benz (卡尔·本茨 )
Match the inventions with the inventors.
A: Who was the car invented by
B: It was invented by Benz.
1885
1971
1976
Wozniak and Jobs
Sinclair
Baird
1927
Bell
1876
Benz
A: What’s this in English B: It’s ...
A: When was… invented B: It was invented in ...
A: Who was… invented by B: It was invented by ...
A: What is … used for B: It is used for …
Report: My favorite invention is …. I think it is …. It was invented in … by …. It’s used for ….
What When Who Be used for
1903
The Wright brothers
Traveling
The plane
Copy and memorize the new words:invent, invention, inventor, calculator, personal computer
Do the exercise of Period 1 in your workbook.
Listen to tapes and have a dictation of the following sentences (听录音并听写下列句子):
What is a telephone used for
It’s used for talking with people.
When was the telephone invented
It was invented in 1876.
Who was it invented by
It was invented by Bell.
Find out the information about them and write down the sentences with Passive Voice like:
gun powder
paper making
printing
compass
… was invented in … It was invented by… It’s used for …
Four Great Inventions of China
选做题