英语九年级鲁教版：Unit 4 《When was it invented？》课件（1）

(共29张PPT)
Unit 4
When was it invented
Section A
Talk about the history of inventions.
The passive voice.
Language Goals:
Grammar Focus:
1b
Listen and match the inventions
with the dates.
a
b
e
d
c
1876
1885
1927
1971
1976
d
a
b
e
c
1c
1c
When was the telephone invented
I think it was invented in 1876.
Julie Thompson
battery-operated
slippers
Chelsea Lanmon
heated ice
cream scoop
Jayce Coziar and Jamie Ellsworth
shoes with adjustable heels
2a
Listen and number the inventions in
the order that you hear.
3
1
2
2b
Who was it / were they invented by
It was/ They were invented by
Chelsea Lanmon.
3b
What do you think is the most helpful
invention
I think the most helpful invention is
the light bulb.
Why is that
Well, it gives people more time to work
and play every day.
The passive voice.
被动语态
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.
被动语态的构成:
助动词be+ (及物动词的) 过去分词
一般现在时
一般过去时
am (is, are) + done
was (were) + done
{
The passive voice.
被动语态
被动语态的用法:
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 American.
2. 不必要说出动作执行者时,常用.
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 (污染).
The passive voice.
被动语态
主动语态变为被动语态的步骤:
把原主动句中的宾语转换为被动语态的主语.
2.把动词改为被动形式,即 “be + 过去分词” . 注意 be
动词要按新的主语的人称和数进行变化,时态要和原来
的主动语态的时态保持一致.
3. 原来主动语态句中的主语,如果需要,就放在by后面
以它的宾格形式出现. 如果没有必要就可以省略.其他的
成分 (定语,状语) 不变, 句式也不能变.
The passive voice.
被动语态
主动语态变被动语态的结构图:
Bell invented the telephone in 1876.
The telephone was invented by Bell in 1876.
主语
谓语动词过去时
宾语
时间状语
主语
谓语动词的过去分词
宾语
时间状语
The passive voice.
被动语态
主动语态改被动语态:
Bell
invented
the telephone
in 1876.
was
by
Students’ book P 70, part 4.
Section B
salty:
in the end:
by mistake:
by accident:
according to:
咸的,含盐的. 名词,salty 加 y 构成形容词．
最后,终于.
eg. Everything will be all right in the end.
弄错的,错误地.
eg. He took the umbrella by mistake.
偶然,意外, 无意中.
eg. I met her by accident in a crowded bus.
根据…, 按照
eg. We’ll be paid according to the amount
of work we do.
sour
sweet
sweet
sweet
crispy
salty
Listen and circle “T” (for true) or “F” (for false).
The potato chips were invented by mistake.
They were invented in 1863.
The customer thought the potatoes weren’t thin enough.
The customer said they weren’t salty enough.
George wanted to make the customer happy.
The customer was happy in the end.
T F
T F
T F
T F
T F
T F
The history of chips
that potato chips were invented by mistake Chips by a chef called George Crum. They were invented in .George Crum cooked them for a long time until they . And he sprinkled lots of salt on them so they were
.
Did you know
were invented
1853
were crispy
really salty
Who invented tea
Did you know that tea, the most popular drink in
the world (after water), was invented by accident
Although tea wasn’t brought to the Western world
until 1610, this beverage was discovered over
three thousand years before that. According to an
Ancient Chinese legend, the emperor Shen Nong
Discovered tea when he was boiling drinking water
over an open fire. Some leaves from a nearby bush
fell into the water and remained there for some
time. The emperor noticed that the leaves in the
water produced a pleasant smell. Later he decided
to taste the hot mixture. It was quite delicious. And
in this way, one of the world’s favorite drinks was
invented.
Read the article and write answers to the questions.
What is the article about
It is about the invention of tea.
It was invented over three thousand
years ago.
It was invented by the Chinese emperor
Shen Nong.
It was invented by accident.
3. Who was it invented by
4. How was it invented
2. When was it invented
Write an article using the notes in the box.
Who: college students
What: metal pie plate, flying disk
When: 1950
Where: bakery Bridgeport, Connecticut
Why: new toy
How: students eat pie, throw pie plates
Today: clubs, magazines, festival
From pie plate to flying disk.
The flying disk was invented by college students.
They used a metal pie plate from a bakery in Bridgeport, Connecticut. Students ate the bakery’s pies and then threw the pie plates. Today, there are flying disk clubs, magazines and a festival.
a pen that listens and writes
New invention:
Use:
It can listen to the writer and
write by itself.
Price :
$ 50
music candle
activity glasses
temperature cup