(共22张PPT)
人教版2022-2023年度九年级英语全册同步课件
Unit 6 When was it invented？
Section（1a-1e）
Learning objectives
1. Master some words & expressions: sour, customer, by mistake, in the end
2. Master some sentence: Potato chips were invented by mistake.
The customer was happy in the end.
3.Learn more about the invention.
What do you think of...
coffee
It tastes bitter.
ice cream
I think it is
Sweet, cool, and delicious!
Lead in
salt
It tastes salty.
potato chips
It tastes crisp.
cake
It tastes sweet.
lemon
It tastes sour.
pepper
It tastes hot.
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
fried chicken
cheese
lemon
Talk about the food with your partner.
1b
I think pineapples are sour. What food is crispy
What food is sour
…
Read the following sentences, predict the conversation.
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
顾客；客户
错误地；无意中
最终；最后
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
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
1. Potato chips were invented by mistake.
mistake 作名词 “错误，误会”。也可以作动词 “弄错，犯错”。常见形式有：make a mistake 出错
e.g. You have made a mistake here.mistake…for… 错把……当作……
They mistook him for his brother. by mistake 错误地
e.g. They sent the letter to me by mistake.
Language points
2. salty 咸 的
salty (tasting of salt) 形容词，意为“咸的；含盐的”，是由名词salt(盐)加后缀-y构成的。
e.g.The soup is a little salty for me.
名词+后缀-y构成的形容词：
luck—lucky health—healthy wind—windy rain—rainy taste — tasty ice —icy snow —snowy sun—sunny
3. in the end 最后，终于 (相当于finally 或 at last)
I was saved in the end.我最后获救了。
by the end常和of相连，用于指时间，意为“到……底(末)为止”
at the end of可以指时间，也可指处所，意为“在……尽头，在……结束时”。
1e Make a conversation about the invention of potato chips. Use the information in 1c and 1d.
A: Did you know potato chips were invented by mistake
B: Wow, I didn’t know that. Who invented them
A: It was invented by a cook called Geroge Crum.
……
— Excuse me, sir. Are you sure the umbrella in your hand belongs to you
— Oh, sorry. I took it ______. Mine is over there, under the chair.
A. at once B. on time
C. by mistake D. in all
The high-speed railway ______ in this city last year. It is easier for people to travel now.
A. will build B. will be built
C. was built D. built
一、单选
C
C
Exercises
He sent an email to Mary last night.（改为被动语态）
An email _____ ______ to Mary ______ _______ last night.
I was given a new toy by my aunt last week.（改为主动语态）
My aunt______ ______ a new toy last week.
This strange cup was used for keeping water warm.（改为一般疑问句）
_______ this strange cup ______ for keeping water warm
was sent
二、按要求改写句子
by him
gave me
Was used
4. The short novel was written by Lu Xun.（对划线部分提问）
_____ _____ the short novel ________ _____
5. Many trees were planted along the river last year.（改为否定句）
Many trees _______ ________ along the river last year.
对不起，我错拿了你的字典。（翻译句子）
I’m sorry, I took your dictionary____ ________.
Who was written by
二、按要求改写句子
weren’t planted
by mistake
Summary
Look up some information about one invention you are interested in, write it down, you can tell us when and how it was invented, who invented it and other things you know about it.
Homework
谢谢
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