Unit 1 When was it invented?>Section A第一课时

课件56张PPT。Unit 1
When was it invented?Section A第一课时Can you read ?heel /hi:l/ n. 鞋跟；足跟
electricity /ilektris?ti/ n. 电；电能
scoop /sku:p/ n. 勺；铲子
style /stail/ n. 样式；款式
project /pr?dzekt/, /pra:dzekt/ n. 项目；工程
pleasure /plez?(r)/ n. 高兴；愉快
zipper /zip?(r)/ n. (= zip) 拉链；拉锁
daily /deili/ adj. 每日的；日常的
website /websait/ n. 网站
pioneer /pai?ni?/, /pai?nir/ n.先锋；先驱
list /list/v. 列表；列清单n. 名单；清单
mention /menSn/v. 提到；说到
Which do you think is the most
important invention in the world?
What others can you think of? TV? telephone? radio?
computer? calculator? car?Do you know what they are?computerradiotelevisioncalculatortelephonecar 1a. Groupwork Look at the things below. In what orders do you think they were invented? Number them [1-5]524131b. Listen and match the inventions
with the dates. 18851976ab1876d1b　Alice: Was your life very difficult when you we re a kid?
Grandma: Oh, not really. Why?
Alice: Well, you didn’t have modern inventions like a telephone, right?
Grandma: Of course we did! How old do you think I am? The telephone was invented in 1876. You need to take a history class, Alice!
Alice: Haha! How about cars? They weren’t invented yet, were they?Grandma: Yes, they were. Cars were invented in 1885. My family had a car.
Alice: Well, did you have a TV?
Grandma: No, we couldn’t afford one. They were expensive in those days. The TV was invented around 1927, I think.
Alice: Well, I know that you didn’t have a computer because we learned in school that personal computers were invented in 1976.
Grandma: You’re right. But I have one now!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 television at that time?
3. Does grandma have personal computer now?
Telephone and car. Because it was expensive. Yes, she does. 1c. Pairwork When was the computer invented?I think it was invented in 1976.______
Shoes with
special
heels_______
shoes with
lights_______
ice cream
scoop runs
on electricity2a.Listen and number the inventions in the order.3122b. Listen again and match the items in
columns.2b. Listen again and match the items in
columns.Alex: Hi, Carol. Wow, what are those?
Carol: Hello, Alex. Oh, these are some of the interesting inventions that I’m writing about for my English homework.
Alex: I see…What’s that, then?
Carol: They’re shoes with lights. People use them for seeing in the dark when you get up at night.
Alex: Oh, that’s a cool idea! I always hit my toe on something on the way to the bathroom at night.Carol: Next is a special ice-cream scoop. This is my favorite invention. It runs on electricity and becomes hot.
Alex: I know what it’s for! It’s used for serving really cold ice-cream
Carol: Yes, that’s right! The last invention I’m going to write about is shoes with special heels. You can move the heels up and down.
Alex: What are they used for?
Carol: Well, you can change the style of your shoes. You can raise the heels if you are
going to a party or lower them if you
are just going out for shopping.2c. Pairwork What is it used for?It is used for seeing in the
dark.2d. Role-play the conversationcameralight bulbherbicidemicrowave ovenrefrigeratorvedio graphying machineair conditionerplastic bagsCan you think of others? 3b. Pairwork A: What do you think is the most
helpful invention?
B: I think the most helpful
invention is the computer.
A: why is that?
B: Because it helps me search
the information that I need. 4. GroupworkImagine that you are alone on a tiny island. Choose five inventions you would like to have on the island with you.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
a telephone.
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.
爸爸在生我的气。
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 do sth…Grammar focusThe passive voice一、语态
英语中动词有主动语态和被动语态两种语态。
主动语态表示主语是动作的执行者，被动语态表示
主语是动作的承受者，在被动语态中动作 的执行者
有时用by短语表示出来。
二、被动语态的构成
助动词be+及物动词的过去分词
am(is,are)+done 一般现在时
was(were)+done 一般过去时三、被动语态的用法
1. 不知动作执行者时，常用被动语态。
eg. My bike was stolen yesterday.
This car is made in America.
2. 不必要说出动作执行者时，常用被动语态。
eg. Rome was not built in a day.
3. 为了突出强调动作的承受者时，常用被动语态。
eg. Thousands of beaches are polluted .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主动语态改被动语态Bellinvented the telephonein 1876.wasby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?They produced that kind of car.
The workers built a bridge over the river.
Mother tells me a story every day.请把下列主动句变为被动句。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.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.
HomeworkMake a list of as least five helpful inventions and five annoying inventions. Write them down on the form on the book.