(共23张PPT)
（人教新目标版）九年级全
Period 4 Section B 1a - 1e
Unit 6
When was it invented
Learning objectives
Key words & phrases：
sour, customer
by mistake, in the end
Key sentences：
1.Potato chips were invented by mistake.
2.Potato chips were invented by a cook called George Crum.
Key structure：
S＋was/were＋past participle＋by…
eg：Potato chips were invented by a cook called George Crum.
crispy
adj. 脆的；酥脆的
sour
adj. 酸的；有酸味的
salty
adj. 咸的
New Words
customer
n. 顾客；客户
We offer customers a free home delivery service.
我们为客户提供免费送货上门的服务。
by mistake
错误地；无意中
He opened Mary’s letter by mistake.
他不小心拆了玛丽的信。
New Words
Watch the video and check your answers.
1. Which one is sour
A. red apple B. green apple
2. Which one is salty
A. apple pie B. French fries
3. Which one is sweet
A. honey B. egg
Choose the correct answer.
Lead in
The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word.
1a
P45
sweet crispy salty sour
______
______
______
______
______
______
______
______
crispy
salty
sour
sweet
salty
Pre-listening
Write the name of a different food after each word.
P45
1b
watermelon
fried chicken
salted peanuts
(咸花生)
vinegar
Pre-listening
What are they talking about
Maybe they are talking about potato chips.
Pre-listening
Listen and circle T for true or F for false.
1c
P45
T F
T F
T F
1. Potato chips were invented by mistake.
2. They were invented in 1863.
T F
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.
T F
T F
back in 1853.
thin
didn’t want
While-listening
Listen again. Complete the sentences.
P45
1d
The History of Potato Chips
were invented
1853
thin
crispy
really salty
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 ___________.
While-listening
一般过去时的被动语态基本结构: _______________________
was/were+动词过去分词
Post-listening
Section B, 1c, 1d
Boy 1: Hey, did you know that potato chips were invented by mistake
Boy 2: Really What do you mean
Boy 1: Well, here on the bag it says that they were invented by a cook called George Rum.
Boy 2: When was that
Boy 1: Oh, it was back in 1853.
Boy 2: So, why was it an accident
Boy 1: Well, one day, a customer came into the restaurant where George worked. He
ordered a plate of fried potatoes. When the potatoes came, he said they were cut
too thick and sent them back to the kitchen.
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 until they were crispy. And he put lots of salt on them so
they were really salty. He thought the customer would hate them.
Boy 2: And
Boy 1: And the customer loved them and asked for more. He told the other customers
about them, and soon everyone was ordering thinly cut, crispy, salty potato chips.
Boy 2: And we’re still eating them today. What a cool story!
Post-listening
Make a conversation about the invention of potato chips. Use the information in 1c and 1d.
P45
1e
A: Did you know potato chips were invented by mistake
B: Wow, I didn’t know that. Who invented them
A: ...
Post-listening
1. When were potato chips invented
2. How were potato chips invented
3. What was the name of the inventor
4. What did the cook do with the potatoes then
Some questions:
Post-listening
Wow, I didn’t know that. Who invented them
Did you know potato chips were invented by mistake
They were invented by a cook called George Crum.
Oh, it was in 1853.
Eh... it is really a long story.
When was that
Wow, cool. Why was it an accident
Never mind, I am not busy.
Post-listening
Who invented the sandwich How was the sandwich invented
Post-listening
1. Potato chips were invented by mistake.
薯条是无意中被发明出来的。
② She put salt into her tea by mistake.
她误把盐放进茶里去了。
by mistake
意为“无意中；不小心”，常置于句末。
① Someone took my cup by mistake.
有人错拿了我的杯子。
Language points
I think you must be mistaking me for someone else.
① It's easy to make a mistake.
② Don't worry, we all make mistakes.
mistake n.
犯错误很容易。
我看你准是认错人了。
没关系，我们都会犯错。
mistake v.
mistake... for... 把……误认为……
错误
make a mistake/mistakes 犯错误
误会；误解
Language points
2. Here on the bags it says that they were invented by a cook called George Rum.
袋子上写着它们是被一个叫George Rum的人发明的。
② Let's see what the instructions say.
让我们看看说明书是怎么说的。
say v.
意为“提供信息；指示”。
① The notice said ‘Keep Out’.
告示上写着“禁止入内”。
Language points
1. What words can you use to describe how food can taste
2. What specific information can you get about potato chips while listening
3. Can you talk about the history of potato chips, using passive voice
Self-evaluation
Write down the conversation you made in 1e.
Homework
