(共19张PPT)
人教版九年级(初中)英语全册
Unit 6
When was it invented
第3课时 Section B 1a-1e
1.熟练使用以下词汇、短语和句型：
crispy, salty, sour, customer...
by mistake, in the end, put...on....
--Potato chips were invented by mistake.
--They were invented in 1863.
--Potato chips were invented by a cook called George Crum.
2.通过参与并完成课堂教学活动，学生能提高听说能力。
3.了解一些重要的发明，丰富学生的眼界，培养学生的创造能力。
教学目标
Free talk
What kind of food do you usually like
List some foods with different tastes.
sweet food
sour food
salty food
I like eating...
课堂导入
sweet food
How do they taste Do you like these
sour food
How does the food taste
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
课堂活动
1b
Write the name of a different food after each word.
sweet ________ crispy ________
salty ________ sour ________
banana
biscuit
potato chips
orange
Listen and circle T for true or F for false.
1c
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
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
1e
A: Did you know potato chips were invented by mistake
B: Wow, I didn’t know that. Who invented them
A:...
Make a conversation about the invention of potato chips. Use the information in 1c and 1d.
1.by mistake为介词短语，意为“无意中；错误地”,相当于accidentally。
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。
【拓展】mistake还可以构成短语：
make a mistake/make mistakes犯错误；
mistake…for… 把……错认成……。
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。
重要知识点
2.The customer thought the potatoes were not thin enough. 顾客认为土豆不够薄。
enough可以修饰名词时，也可以修饰形容词、副词
There isn’t enough food in the dinning hall.餐厅里的食物不太够。
He wrote carefully enough to get the award of the competition.
enough常可以和词组so-that，too-to转换。
He didn’t run fast enough to catch up with the others.
He ran so slowly that he couldn’t catch up with the others.
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
At the end of this month we’ll have a meeting.这个月月末我们将会开个会。
By the end of last year we’ve made ten planes.到去年末为止我们已经做了十架飞机了。
(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 。
He won in the end. 最后他赢了。
He won finally. 最后他赢了。
He won at last. 最后他赢了。
一、根据汉语提示填空。
1.He met his parents on Christmas in the ________ (结束).
2.We must make the ________ (顾客) happy.
3.The child took the medicine as sweet by ________ (错误).
4.The milk is ________ (酸的). You must throw it away.
5.The potato chips ________ (卖) well at that time.
end
课堂练习
end
end
end
end
二、单项选择。
( )1.The woman went into the men’s toilet _____ mistake.
A.for B.at C.of D.by
( )2.This heated ice-cream scoops were invented by a man ____ Lanmon.
A.was called B.called C.to call D.is called
D
B
二、单项选择。
( )3.—The soup tastes ______.
—Maybe I added too much ______ just now.
A.salt;salt B.salty;salty C.salt;salty D.salty;salt
( )4.Did the police catch the thief _____
A.on the end B.by the end C.at the end D.in the end
D
D
1. New words and phrases ：
crispy, salty, sour, customer... by mistake, in the end, put...on....
2. key sentences ：
--Potato chips were invented by mistake.
--They were invented in 1863.
--Potato chips were invented by a cook called George Crum.
3. Important language points：
(1) by mistake用法 (2)enough 用法 (3)in the end相关短语和用法
What have we learned in this class
课堂总结
1.Review key knowledge points of this lesson.
2. Preview the next lesson.
家庭作业
Thank you！
