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If+从句，主句……
Patterns:
Lead-in 1
What can you do on a computer?
Lead-in 2
The Internet is a form of technology that has changed our lives.
The power of the Internet
How do you use the Internet?
receive / send e-mails
search for information
chat with my friends
learn English
Can you name the parts of a computer?
3.
4.
1.
screen
monitor
keyboard
2.
mouse
Look and say
What device does Jenny/Danny/Brian use?
tablet
平板
电脑
desktop
台式
电脑
laptop