Unit6. When was it invented?
Section A (1a-1d)
Knowledge objects:
Key vocabulary: project,pleasure,zipper,daily,website,pioneer,
list,mention, have a point
Target language:
①I think the TV was invented before the car.
②---When was the telephone invented?
---I think it was invented in 1876.
③The pioneers of different inventions were listed there.
④But at that time, it wasn’t used widely.
Structure:Passive voice of the past tense.
Ability objects:
1.E nable the students to talk about the history of inventions using
the passive voice of the past tense.
2.T rain the students’ listening and speaking skills.
Moral objects: Many inventions have changed the world a lot. Teaching key and difficult points:
Learn to talk about the inventions by using the passive voice of the past tense.
Teaching procedures:
Step1. leading in
Have a free talk and then ask two students to talk about the pictures with the sentence What’s it used for?”
Step2. Listening practice
Show some flashes; listen carefully and match the years with the inventions.
Step3. Pair work
Then ask students to make a conversation :
A: When was the computer invented ?
B: It was invented in.... .
A: What’s it used for?
B: It is used for.......
Step4. Listening
Have students listen to the conversation in 2d and fill in the following the blanks.
1.What is the subject for their school project?
Small inventions that changed the world. 2.What kind of invention does Roy think of?
The zipper.
3.Why does Roy think it is a great invention?
Because it is often used in our daily lives. 4.Who and when was the zipper invented?
Whitcomb Judson in 1893.
5. When did the zipper become popular?
Around 1917.
Language points.
Read in groups
Step6. Role play the conversation.
Step7. Consolidation
Fill in the banks.
Paul:Hey Roy, the subject for my school________ is “Small ________that changed the world.” Can you help me _______an
invention?
Roy: My________! Let me think ... hmm ... I know! the______!
Paul: The zipper? Is it really such a great invention?
Roy: Think about how often it’s used in our _____lives. You can see zippers on dresses, trousers, shoes, bags ... almost everywhere! Paul: Well, you ___ seem to ___________...
Roy: Of course! I thought about it because I saw a ______ last week. The _______of different inventions were _____ there. For example, it __________that the zipper was invented by Whitcomb Judson in
1893. But at that time, it wasn’t used ______.
Paul: Really? So when did it become popular?
Roy: Around 1917.
Translation
Paul: Hey Roy, the subject for 我们学校的课题is “改变世界的小发明.” Can you help me think of an invention?
Roy: 这是我的荣幸! Let me think...hmm...I know! 拉链!
Paul: The zipper? 它真是一项如此伟大的发明吗?
Roy: Think about how often is used在我的日常生活中. You can see zippers on dresses, trousers, shoes, bags ...almost everywhere! Paul:嗯，看来你说的确实有点道理...
Roy: Of course! I thought about it because I saw a website last week.
不同发明的先驱者被列在那里. For example, it mentioned that the zipper was invented by Whitcomb Judson in 1893. 但在那时候,拉链并没有被广泛地使用。

Paul: Really? So when did it become popular?
Roy: Around 1917.
Step 7 .:cooperative study
1) 一般现在时的被动语态与一般过去时的被动语态有什么不同？他们的结构是怎样？那一般将来时的被动语态与含有情态动词的被动语态又是一个什么样呢？
一般现在时：S主+(is,am,are)+Vpp+by/in+....一般过去时: S主+(was,were)+Vpp+by/in+....
2) 翻译成被动语态：
1.英语被广泛地使用。

English is spoken widely.
2.小刀可用来切东西。

Knife is used for cutting.
3.灯泡是由Edison 发明的。

The light was invented by Edison.
4.刚才，小明打扫了教室。

The classroom was cleaned by Xiao ming.。