When was it invented?
Unit 6
Which do you think is the most important
invention in the world?
What other can you think of?
TV? telephone? radio?
computer? car?
Can you tell when they were invented?
A: I think … was invented before …
B: Well, I think … was invented after ….
game
1a
GROUPWORK
Look at the things below. Number them [1—5] according to the order they were invented.
3
5
2
4
1
A: I think … was invented before …
B: Well, I think … was invented after ….
game
A: I think … was invented before …
B: Well, I think … was invented after …
game
a
1b
Listen and match the inventions with the dates.
___ 1876
___ 1885
___ 1927
___ 1971
___ 1976
b
a
c
d
e
b
e
c
d
1c
PAIRWORK
Student A, cover the dates and ask student B when were the things in the picture above were invented.
Model
A: When was the telephone invented?
B: I think it was invented in 1876.
A: When was the car invented?
B: I think it was invented in 1930. I think it was invented after the telephone.
A: When was the _______ invented?
B: I think it was invented in ______.
Pairwork (1c:P68)
1976
1885
1876
1927
1971
Edison invented the light bulb.
The light bulb was invented by Edison.
Who was the light bulb invented by?
The telephone by Bell.
was invented
Who was the telephone invented by?
Bell invented the telephone.
______ was invented by _______.
The car
Karl Benz
Who was the car invented by?
Karl Benz invented the car.
A: What is the car used for?
B: The car is used for traveling.
A: What is the _______ used for?
B: I think it is used for _______________
.
talking with people
A: What is the
used for?
B: I think it is used for _______. (count)
counting
A: What is the
used for?
B: I think it is used for ________.(work)
working
A: What is the
used for?

B: I think it is used for _____.(ride)
riding
A: What is the _______ used for?
B: It is used for __________.
counting
(count)
A: What is the
used for?

B: It is used for ___________.(count)
counting
A: What is the
used for?
B: It is used for


___________. (watch the things far away clearly)
watching the things
far away clearly.
A: What is the ________ used for?
B: It is used for __________________ .
making the food hot.
(make the food hot)
A: When was …invented?
B: It was invented in…
A: Who was it invented by?
B: It was invented by…
A: What is the … used for?
B: The … is used for doing…
pairwork
Who were they invented by?
What are they used for?
adjustable 可调整的
operate 操作
heat 加热
3
1
2
2a
Listen and number the inventions in the order that you hear them.
2c
PAIRWORK
Role play the conversations using the information in the chart above.
Model
A: Who was / were it / they invented?
B: They was / were invented by ….
A: What is / are it / they used for?
B: It / they is / are used for ….
be used for 被动语态, “被用来做……”。介词 for 表目的用途, 可接名词或动名词形式。
A: What is this?
B: This is a heated ice cream scoop.
A: What is it used for?
B: It is used for scooping really cold ice cream.
A: Who was it invented by?
B: It was invented by Chelsea Lanmon.
Oral Practice
四、主动语态变为被动语态的步骤:

They speak English.
主语 谓语 宾语
English is spoken by them.
主语 谓语动词的过去分词 宾语
(1)主动语态的宾语变成被动语态的主语。
(2)主动语态的谓语动词变为被动语态的谓语动词，即”“be+及物动词的过去分词”(be有时态、人称和数的变化)。
(3)主动语态的主语变为by的宾语。
主动语态变为被动语态的步骤
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。
Revision:Writing
五、被动语态的时态表示
被动语态的时态一般只通过be表现, 过去分词
不变。例如：
一般现在时: The trees are planted by the farmers.
一般过去时: The trees were planted by the
farmers.
现在进行时: The trees are being planted by the
farmers.
一般将来时：The trees will be planted by the
farmers.
现在完成时：The trees have been planted by
the farmers.
含情态动词的被动语态：The trees can
(must,should) be planted by the farmers.
六、被动语态的几种句型：
肯定句 主语+be+过去分词+(by…)
A sweet song was sung by her on the stage.
否定句 主语+be+not+过去分词+(by…)
A sweet song wasn’t sung by her on the stage.
一般疑问句 Be+主语+过去分词+(by…)
Was a sweet song sung by her on the stage?
特殊疑问句
疑问词+be+主语+过去分词+(by…)
Where was a sweet song sung by her?
1. The woman asked the policeman for help.
2. The old man on TV tells a story on Sunday.
3. Do they use the box as a table?
4. She sent me a collection last week.
5. The teacher doesn’t teach us math this term.
练习: 请把下列主动句变为被动句
6. Did Lily buy her sister a hat?
7. We often hear him play the violin at home.
8. The lazy boy didn’t wash clothes yesterday.
9. Students listen to the kind teacher carefully.
10.When did your father took you to the park.
3a
PAIRWORK
Make a list of five helpful inventions and five annoying inventions.
vacuum cleaner
television
car
computer
fax machine
air-conditioner
truck
hair dryer
junk food
ice cream
Model 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.
Model 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.
Model 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.
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.
3b
PAIRWORK
Discuss your opinion in activity 3a with your partner.
Model 1
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.
Model 2
4
GROUPWORK
Choose five inventions you would like to have if you are alone on an island.
A: I’d like to have a radio because I could listen to music all day.
B: Yes, but that’s not going to help you leave the island. I think it would be better to have …
Model 1
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.
Model 2
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.
Model 3
HOMEWORK
Write an article according to the information in part 4.
Exercise
1. They produced that kind of car.

2. The workers built a bridge over the river.
3. Mother tells me a story every day.
That kind of car was produced by them.
A bridge was built by the workers over the river.
I am told a story by Mother every day.
I. 请把下列主动句变为被动句:
1. The TV ___________ (invent) around 1927.
2. They are used for ______ (see) in the park.
3. This kite _________ (make) by Uncle Wang.
4. Tea _____________ (discover) a long time ago.
5. Our classroom ________________
(should clean) every day.
was invented
seeing
was made
was discovered
should be cleaned
II. 用所给动词的适当形式填空：
1. ______ ____ the computer ________ (什么时候发明的)？
2. ____ was the car ________ ___ (谁发明的)？
3. A pen ___ ____ ____(用来做) writing.
4. What do you think is ____ _____ _______
_________ (最有帮助的发明)？
5. He said the fish was ____ ______ (足够咸)。
When was
is used for
invention
the most helpful
salty enough
Who
invented
by
invented
III. 根据汉语完成句子：
Explanation
1. It’s used for scooping really cold ice cream.
be used for 意为“被用来……”,强调用途或作用。
e.g. The duster is used for cleaning the rooms.
be used as 意为”被当作……来用”，强调被当作工具或手段来用。
be used by 意为“被……使用，强调使用者。
e.g. The big box is used as a table.
The car is used by our manager.
2. Shoes with adjustable heels were invented by…
(1) with 是介词，意为”“具有，持有，带有”。
e.g. a girl with long hair
a house with a blue roof
(2) adjustable意为“可调整的，可调节的”。
e.g. I have a pair of shoes with adjustable heels.
(3) invent是动词，意为“发明，创造”。
e.g. Edison invented the light bulb.
invention是名词，“发明，发明物”
e.g. Edison had about 2,000 inventions during his lifetime.
3. Battery-operated slippers were invented by…
operate用法：
(1) “操作”
e.g. Can you operate the computer?
(2)“起作用，见效果”
e.g.The sleeping pill operated at once.
(3)“经营，管理”
e.g.The company operates ten factories.
(4)“动手术”
e.g.The doctor will operate on his mother next week.
4. annoying adj. 讨厌的, 恼人的 (往往指事物)
e.g. How annoying it is! 真讨厌。
annoyed adj. 生气的, 恼怒的 (往往指人)
e.g. My father is annoyed with me.
爸爸在生我气。
5. helpful adj. 有帮助的, 有益的
e.g. Mr. White is a very helpful man.
构词法：n + ful → adj
e.g. use + ful → useful
thank + ful → thankful
beauty+ ful → beautiful
care + ful → careful
6. Imagine that you are alone on tiny island.
alone adj. 意为“单独的”, 不带感情色彩。
e.g. When his wife died, he lived alone.
lonely adj. 意为“孤独的, 寂寞的”
e.g. He feels lonely when he is alone.
lonely 指地方时表示“荒凉的, 偏僻的”
e.g. The old man lives in a lonely small village.
7. I think it would be better to have…
(1) would 在此处表示“料想或猜想、揣测”，后接动词原形或完成式。
e.g. What would she be doing there?
(2)It is better to do sth… “最好做……“，it是形式主语，动词不定式是真正的主语。
e.g. It is better for you to walk to school.
It is better to do sth…=had better to do sth…