资源简介

(共36张PPT)
Unit 6
When was it invented
Section B (1a-1e)
Learning Objectives
学习一些食物名词以及表达味觉的常用词汇：crispy, sour, sweet, salty… 能够理清描述某种食物发明的基本框架（时间、发明者、原因、具体过程、结果等）。（学习理解）
结合图片所给信息，描述食物以及其对应的味觉体验；能够理清听力对话中描述的薯片的发明历史及过程；结合图片，运用被动语态对薯片的发明过程进行复述。（应用实践）
理解每一个现有的发现可能都是一个美好的意外，因此在生活中要多留意，多观察，对事物保持好奇心；并在课后拓展了解一些有趣的意外的发明，将所了解到的信息与大家分享。 （迁移创新）
通过本课时学习，我们能够：
1
2
3
Let’s go shopping!
Different food has different tastes.
We bought pears, watermelons and ice-cream. How does the food taste
Sweet.
I bought salted duck
eggs, bacon and salt. How does the food taste
Salty.
/ s lti/
I bought oranges,
lemons and vinegar. How does the food taste
Sour.
/ sa (r)/
I bought potato chips.
How does the food taste
Crispy.
/ kr spi/
I bought spicy gluten
and chili. How does the
food taste
Spicy.
/ spa si/
What kind of food do you like Which taste do you like best
酸的
甜的
苦的
辣的
咸的
脆的
新鲜的
软的
硬的
多汁的
健康的
厚的
薄的
好吃的
sour
sweet
bitter
hot/spicy
salty
crispy
fresh
soft
hard
juicy
healthy
thick
thin
delicious
Words to describe tastes
The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word.
1a
sweet crispy salty sour
__________ _________ ________ _________
__________ _________ _________ _________
crispy
sour
salty
sweet
salty
Write the name of a different food after each word.
1b
sweet ____________________________
crispy ____________________________
salty ____________________________
sour ____________________________
banana
watermelon
Beijing Duck
fried chicken
vinegar
cookie
salted duck eggs
lemon
I think bananas and watermelons are sweet.
Quick response
Prediction
They are talking about potato chips.
What are they doing
Do you know how potato chips were invented
Read the following sentences, predict the answers.
T F
T F
T F
T F
T F
T F
1c
1. Potato chips were invented by mistake.
2. They were invented in 1863.
3. The customer thought the potatoes were not thin enough.
4. The customer said they were not salty enough.
5. George wanted to make the customer happy.
6. The customer was happy in the end.
错误地；无意中
最后，终于
顾客；客户
足够咸
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
Listen and circle T for true or F for false.
1c
Listen again. Complete the sentences.
1d
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
Listen again and fill in the blanks.
Boy 1:Hey,did you know that potato chips were invented __________
Boy 2: Really What do you mean
Boy 1: Well, here on the bag it says that they were invented
_______________ George Crum.
Boy 2: When was that
Boy 1: Oh, it was____________ .
Boy 2: So, why was it ____________
Boy 1: Well, one day a customer came in the restaurant where George worked. He ordered ________________________ . When the potato came, he said they were cut __________ and sent them back to the kitchen.
by mistake
by a cook called
back in 1853
an accident
a plate of fried potatoes
too thick
Boy 2: So what happened
Boy 1: Well, George was angry so he cut the potatoes really, really thin, and he cooked them for a long time_____________________ . And he________________ them so they were really salty . He thought the customer would hate them.
Boy 2: And
Boy 1: And the customer loved them and ________________ . He told the other customers about them, and soon everyone was ordering thinly-cut, ____________potato chips.
Boy 2: And we're still eating them today. What a cool story!
until they were crispy
put lots of salt on
asked for more
crispy, salty
Listen again and fill in the blanks.
1
2
The potatoes are cut very thin.
4
3
They are cooked for a long time.
Some salt is put on them.
They become
crispy.
Retell the steps.
Do you know how to make potato chips
The History of Potato Chips
When
Who
How
Result
Why
1853
George Crum
The customer said the fried potatoes were cut too thick and sent them back to the kitchen. George was angry.
1. Cut the potatoes really, really thin.
2. Cooked them for a long time until they were crispy.
3. Put lots of salt on them.
The customer loved them and asked for more.
Finish the mind map, then retell.
Do you know potato chips
were invented
They were invented by a
______called George Crum
in .
by mistake
cook
1853
1
Retell the story
Who
When
2
One day a customer _______a plate of fried potatoes. When they came, he said they________ too ______ and sent them back to the kitchen.
ordered
were cut
What
happened

thick
3
George was so angry that he cut the potatoes really ,and cooked them for a long time until they were . Then he put lots of salt on them, so it tasted . He thought the customer would hate them.
thin
crispy
salty
What
happened

4
However, the customer them and . And we’re still eating them today.
loved
asked for more
What
happened

How much do you know about potato chips
Potato chips by many people.
It that potato chips are more than 150 years old.
Even today potato chips still by most people.
They by accident in 1853.
The inventor George Crum.
One day, he to serve fried potatoes by a customer.
When the potatoes came, the customer thought they too thick.
The potatoes for a long time until they were crispy.
some salt ________on potato chips.
are loved
is said
are
enjoyed
were invented
was called
was asked
were cut
were cooked
is put
Creative inventions
Creative invention
Creative inventions come from small things in life.
by mistake为介词短语，意为“无意中；错误地”, 相当于accidentally
【语境领悟】
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
mistake
1. n. 错误。make a mistake/make mistakes 犯错误
eg:I used to make mistakes in spelling．我过去常常犯拼写错误。
2. v. 弄错; 误解
eg:You mistook my meaning entirely. 你完全误解了我的意思。
mistake ... for ... 错把……当成……
eg:Don't mistake me for an American. 不要把我误会成美国人。
in the end 最后，终于 (相当于finally 或 at last)
【拓展】
at the end of 可以指时间，也可指处所，意为“在……尽头，在……结束时”。
by the end 常和of相连，用于指时间，意为“到……底(末)为止”
【学以致用】1.他在花园的尽头的那边。
He is down ______________ the garden.
2.最后，我们找到了答案。
____________, we found the answer.
3.到比赛结束时, 我们已经精疲力尽。
_____________________, we were exhausted.
at the end of
In the end
By the end of the game
重点词组：1.by mistake 2.thin enough
3.salty enough 4. in the end
重点句型：
1.Potato chips were invented by mistake.
2.The customer thought the potato were not thin enough.
3.The customer said they were not salty enough.
4.The customer was happy in the end.
重点语法：Passive voice：
Potato chips were invented by mistake.
(　)1. —Sorry, Pam, I took your notebook ______．
—It doesn't matter. They look the same as each other.
A．by hand B．by mistake C．in trouble D．in danger
(　)2. I can't stand these ______ oranges. I like sweet food.
A．crispy B．salty C．sour D．delicious
(　)3 .The soup isn't ______. Please add some ______ to it.
A．salt enough; salty B．salty enough; salt
C．salt; salty enough D．enough salty; salt
(　)5.In summer, Susan often drinks some _____ water when she comes back from school.
A．boiling B．boil C．boiled D．boils
B
C
B
C
Exercises
一、单项填空
1. The TV ____________ (invent) around 1927.
2. They are used for _______ (see) in the dark.
3. This kite _________ (make) by Jack.
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
二、用所给词的正确形式填空
I don’t like eating chocolate. The taste is too _______ .
Mom added salt but it still wasn’t ______ enough.
I prefer lemons to oranges. I like the ______ taste.
She likes _______ cookies. They are hard, dry and easily broken.
sweet
salty
sour
crispy
crispy sweet salty sour
三、选词填空
Exercises
Excellent Good To be improved 评价项目 自我评价 同伴评价 老师评价
能够学习一些食物名词以及表达味觉的常用词汇
能够理清描述某种食物发明的基本框架（时间、发明者、原因、具体过程、结果等）
能够理清听力对话中描述的薯片的发明历史及过程；结合图片，运用被动语态对薯片的发明过程进行复述
能够理解每一个现有的发现可能都是一个美好的意外，因此在生活中要多留意，多观察，对事物保持好奇心
Homework
Must do: 1. Memorize the new words and phrases;
2. Finish the exercises;
3. Preview the passage Do You Know When Basketball Was Invented on page 46.
Try to do: Search for more inventions that you are interested in.

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