《When was it invented?》PPT课件13

《When was it invented?》PPT课件13

Look and number the things in right order.

A:  I think the TV was invented before the car. What’s your opinion?

B:  I agree./ I don’t think so/disagree. I think the TV was invented after the car.

According to what you have listened, answer the questions below. 

1. What did the grandma have when she was young? 

2. Why didn’t they have a TV at that time? 

3. Does grandma have personal computer now? 

... ... ...

What invention are they talking about?

The zipper.

Who invented the zipper?

It was invented by Whitcomb Judson.

When was the zipper invented?

In 1893.

When was it used widely?

In 1917.

Where can you see zippers?

On dresses, trousers, shoes, bags,… almost everywhere.

... ... ...

discover, invent和find都是动词, 它们的词义相近, 但是有区别:

★discover意为“发现”, 指发现某种本来存在,但以前未被发现或未为人所知的事物或现象。

The lost bike was discovered at the bus stop. 

丢了的自行车在公共汽车站那儿找到了。 

Later I discovered that he was so kind.

后来我才发现他那么善良。

★invent 意为“发明”, 指发明以前不存在的东西。

Do you know who invented the computer? 你知道谁发明的电脑吗？

★find 意为“找到, 发现”, 指偶然发现或几乎没有困难地发现。

I found some old photos in that drawer.我在那个抽屉里发现了一些旧照片。 

... ... ...

根据句意和所给汉语提示, 完成下列单词的确拼写。

1. That’s the most _________ (有用的) book.

2. It is said that Thomas Edison had 1,093___________ (发明) during his lifetime.

3. --- What is this kind of machine used for?

--- It’s used for _________ (听) to music. 

4. If you _________ (加热) the ice, it will soon become water.

5. Children also need time _________ (玩耍). 

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