九年级英语上册Unit4AmazingScienceTopic1WhenwasitinventedSectionD课件（新版）仁爱版.ppt

Unit 4 Amazing Science Topic 1 When was it invented ?
Section D
Many people use computers.
Computers _____ ________
by _______ _________.
The workers plant trees in the garden.
Trees _____ _______ in the
garden ____ the workers.
are used
many people
are planted
by
Can you try ？
你认识这些好朋友吗 （英汉互译）
；方位

review the grammar( page 87)
找一找这四组句子的共同点是什么呢？
were/was　+　
A: What’s the lock made of?
B: It’s made of metal.
A: What’s it used for?
B: It’s used for locking the door.
v.（用锁）锁上，被锁住
2 Follow the example to make up similar conversations.
lock/metal
What’s it used for?
It’s used for communicating easily.
How will you find your lost cellphone?
GPS is like a man-made star. We can use it at any time, in any place and in any weather to find out our position.
Do you know how the early explorers find their position ?
Let’s use the GPS.
，
勘探者
Teaching aims:
。
，并根据刚学过的内容总结含有情态动词的被动语态。
are we?的阅读，训练同学们从细节入手，培养良好的阅读****惯。
1. How did the early explorers know where they were?
They found out where they were by using stars.
2. What’s the disadvantage of using the stars as guiding marks?
Its disadvantage is that it didn’t work well when the weather was bad and the stars could not be seen.
3. What is a GPS? Is it useful to use?
It is like a man-made star. We can use it at any time, in any place and in any weather to find out our position. It is very useful.
4. What do you think the GPS will be used for in the future?
…
Read the passage and answer the questions on Page88.
找一找，记一记
；找出
，起作用





find out
work well
The rest of the time
man-made
at any time
as long as
can be used