精品课件外研版九上《Module 4 Great inventions》ppt课件.ppt

文档介绍：Module 4 Great inventions Unit 1  Paper and printing have been used for ages.
Module 4 Great inventions
invent
invention
Four great inventions in ancient China:
compass
paper
gunpowder
printing
Printing and paper have been invented in ancient China.
They have been used for ages.
printing
paper
Printing and paper have been invented in ancient China.
They have been used for ages.
现在完成时的被动语态:
have/has + been + .
Can you find the similar ?
What other do you know?
A: A… has been invented .
B: Yes. It has been used for ages.
Practice in pairs.
battery
digital camera
cell phone
computer
inventions
charge充电
A: A cell phone has been invented .
Washing machine
fridge
e-bike
plane
train
robot
car
More inventions
A:What ’s the of a …?
B:It can be used to…
Talk in pairs.
advantage
(call someone anywhere, read books,
send e-mail, take photos more clearly...)
优点
A:What ’s the of a cell phone?
B:It can be used to call someone anywhere.
digital camera
cell phone
computer
It can be used to call someone anywhere.
Photos can be taken more clearly by the digital camera .
含情态动词的被动语态:
can /may /must/should…+ be + .
Think over the structure
an online magazine
an ordinary magazine
the sixth issue
期
普通的