(共22张PPT)
Unit 1
When was it invented
Section B (1a-1e)
Learning aims:
1. 通过谈论炸薯条的偶然发明来学习一般过去
时的被动语态。
2. 能听懂听力材料中的物品发明的过程。
学会根据关键词归类。
3. 在与同伴口语活动或听力材料的学习中了解
发明创造的特点，体会社会发展变化的规律
是偶然与必然的结合。
重点、难点：一般过去时的被动语态。
inventions
Old inventions
Electric stuffs
Food
Transportations
abacus
binoculars
sweet
crispy脆的
salty
咸的
How do they taste
hot
bitter苦
red bayberries
peppers
sour酸
cookies
crispy
lemons
sour
sweet
candy
salty
ice cream
tea
delicious
nice
hot
awful
1a The words in the box describe how food
can taste. Write them under the correct
pictures. Some pictures have more than
one word.
sweet crispy salty sour
__________
_____
_____
_____
crispy
salty
sour
sweet
salty
1b
sweet: ____________________________
crispy: ___________________________
salty: _____________________________
sour: _____________________________
banana, apple, soda, cake, honey
salad, lettuce（生菜）,french fries
french fries, olives（橄榄）…
yougurt， lemon， pickle(泡菜),
Write the name of a different food after each word.
Potato
chips
How to make potato chips
Slices thin.
cook
crispy
sprinkle
potatoes
1c Listen and circle T for true or F for
false.
1. Potato chips were invented by mistake. T F
2. They were invented in 1863. T F
3. The customer thought the potatoes were not
thin enough. T F
4. The customer said they were not salty enough.
T F
5. George wanted to make the customer happy.
T F
6. The customer was happy in the end. T F
错误地；无意中
1d Listen again. Complete the sentences.
The History of Potato Chips
Do you know how potato chips were invented Potato chips _____________by a cook called George Crum. They were invented in _____ . George Crum cut the potatoes really, really ______ and then cooked them for a long time until they were _______. Finally he put lots of salt on them so they were __________.
were invented
1853
thin
crispy
really salty
It is said the sandwich was invented in England in the 18th century by John Montagu, 4th Earl of Sandwich.
He asked his servants to prepare a chunk (大块) of meat between two slices of bread, so that he could carry on gambling without stopping to eat.
拓展阅读
1.by mistake为介词短语，意为“无意中；错误地”,
相当于accidentally。
例句：
I missed the school bus by mistake this morning.
今天早上我无意中错过了校车。
I took your pen by mistake. 我错拿了你的钢笔。
Language Points
【拓展】
mistake还可以构成短语：
make a mistake/make mistakes犯错误；
mistake…for… 把……错认成……。例句：
Don’t make mistakes any more. 别再出错了。
I mistook her for our English teacher.
我把她错认成我们的英语老师了。
2.The customer thought the potatoes were not
thin enough. 顾客认为土豆不够薄。
enough修饰名词时，不需要倒装。
如: 我有足够的钱。
餐厅里的食物不太够。
There isn’t enough food in the dinning hall.
其修饰形容词、副词要倒装。
He wrote carefully enough to get the award of the
competition.
I have enough money.
enough常可以和词组so...that，too...to转换。
如：他跑得不够快，赶不上其他人了。
用enough
He didn’t run fast enough to catch up with the others.
用so...that
He ran so slowly that he couldn’t catch up with the others.
用too...to
He ran too slowly to catch up with the others.
3.The customer was happy in the end.
顾客最终高兴了。
(1) in the end 后来，最后，终于
at the end of ... 在……末
by the end of ... 到……末为止
如：①这个月月末我们将会开个会。
At the end of this month we’ll have a meeting.
②到去年末为止我们已经做了十架飞机了。
By the end of last year we’ve made ten planes.
(2) in the end 用一个单词表达可以是finally，
用一个短语表达可以用at last 。
如：最后他赢了。
He won in the end.
He won finally.
He won at last.
Ⅰ. 用所给词的正确形式填空。
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
Exercises
Ⅱ.选词填空。
1. I don’t like eating chocolate. The taste is too _______ .
2. Mom added salt but it still wasn’t ______ enough.
3. I prefer lemons to oranges. I like the ______ taste.
4. She likes _______ cookies. They are hard, dry and
easily broken.
sweet
salty
sour
crispy
crispy sweet salty sour
Ⅲ. 翻译句子。
1. 顾客最后终于高兴了。
The customer was happy ______________.
2. 这个顾客说这个薯条不够脆。
The customer said that the potato chips weren’t
________________.
3. 乔治想让顾客高兴。
George wanted __________the customer ________.
in the end
crispy enough
happy
to make
4.薯条是一个名Crum的厨师发明的。
The potato chips_____ _________ by a cook _______Crum.
5. 昨天这个厨师往鱼上面撒了许多盐。
The_____ ______lots of salt _____ the fish yesterday.
called
cook put
were invented
on
Homework
Listen to 1b.
Make conversations with other students
talking about how potato chips were
invented after class.
Write a conversation to talk about
something else.
