Unit 9When was it invented?

Section A Period 2

Pairwork (3a:P70)

Helpful inventions: vacuum cleaner, soundproof door and window, car, computer, fax machine

Annoying inventions: air-conditioner, truck, telephone, junk food, ice cream

Make a list of five helpful inventions and five annoying inventions.

Sentence pattern: What is this in the picture? What is it used for? Do you think it is helpful / annoying?

Dialogue 1:

A: What is this?

B: It is an alarm clock. A: What is it used for?B: It is used for waking people up in the morning.A: Do you think it is annoying?B: Sometimes, when I want to go on sleep.

Dialogue 2:

A: What is this?

B: It is a light bulb. A: What is it used for?B: It is used for giving light.A: Do you think it is helpful?B: Yes, I think so. Because I always do homework and read books in the evening by its light.

Dialogue 3:

A: What is this?

B: It is a microwave oven. A: What is it used for?B: It is used for heating cold food and cooking meals.A: Do you think it is helpful?B: Yes, I think so. Because my parents are very busy and I can use it to cook meals by myself.

Pairwork (3b:P70)

Discuss your opinions in 3a with your partner.

Dialogue 1:A: What do you think is the most helpful invention?B: I think the most helpful invention is the vacuum cleaner.

A: Why is that?B: Well, it can help me clean the floor when mother asks me to do the cleaning.

Dialogue 2:A: What do you think is the most annoying invention?B: I think the most annoying invention is the air-conditioner.A: Why is that?

B: Well, I feel uncomfortable in the room with an air-conditioner.

A: What do you think are the most annoying or helpful inventions?B: I think the truck is the most annoying invention and the soundproof door and window is the most helpful invention.

Dialogue 3:

A: Why is that?B: The trucks always make noises and people can’t sleep well. If they have the soundproof door and window, people needn’t worry about the noises anymore.

Groupwork (4: P70)What inventions would you choose with you if you are alone on a tiny island? Tell your partner what you chose and why.

A: I’d like to have some matches because I could light a fire to keep warm.B: Yes, but that’s not going to help you leave the island. I think it would be better to have a cell phone.

Dialogue 1:

A: I’d like to have a telescope because I could look far.B: Yes, but that’s not going to help you leave the island. I think it would be better to have a signal lamp.

Dialogue 2:

1.We use the _________ to count. The calculator __________________2.We use _________________ to make the

food hot. The microwave oven _________ __________________

calculatoris used for counting.

the microwave oven

用合适的词填空。

is used formaking the food hot.

3. The _________ is used for _________________. (talk with

people)4. Who _____ light bulbs________ by?5. The computer _____________

1976.

talking with peopletelephone

were inventedwas invented in

1. Who invented the _________ ?2. Mrs Brown bought a new ________________ last week.3. I’d like a pair of ___________.4. The _________ is the most helpful invention.5. There are three small ________ in the radio.

根据图片提示，在横线上填入适当的单词完成句子，每空一词。

1题图 2题图3题图 4题图 5题图

calculator

microwave ovenslippers

light bulbbatteries

根据括号内要求完成句子，每空一词。1. Cars were invented in 1885. ( 对划线

部分提问 ) ______ were cars invented? 2. Julie Thompson invented electric slipp

ers. ( 改为被动句 ) Electric slippers _______________ Jul

ie Thompson.

When

were invented by

3. We all noticed her face turn red. ( 改为被动句 ) Her face _____________ turn red by us all. 4. The light bulb was invented by Tomas Edis

on. ( 对划线部分提问 ) ________ the light bulb invented by?5. The refrigerator is used to keep food fresh.

( 改为同义句 ) The refrigerator is used __________ food fr

esh.

was noticed to

Who was

for keeping

汉译英。1 ）计算机是何时发明的？

2 ）谁发明了计算机？

3 ）计算器是用来做什么？

4 ）你认为什么是最有用的发明？

5 ）每天它能够给人们更多时间工作

和玩。

1. When was the computer invented?2. Who was the computer invented by?3. What’s the calculator used for?

4. What do you think is the most helpful invention?

5. It gives people more time to work and play every day.

1. I open the door.The door is opened by me.

2. He often helps homeless people.Homeless people are often helped by him.

3. I handed out some papers just now.Some papers were handed out by me just now.主动语态 : 主语是动作的执行者。被动语态 : 主语是动作的承受者。被动语态结构为：

( 主动语态 )

( 主动语态 )

( 主动语态 )

( 被动语态 )

( 被动 )

( 被动语态 )

be+过去分词

将下列句子变为被动语态。

Homework

Preview Section B. Search some information about potato chips and tea.