Unit 6 When was it invented Section B1 ( 1a-1e) 优学案（含答案）

Unit 6 When was it invented
Section B1 ( 1a-1e)
【学习目标】
1．能够通过听说学习与食物有关的词汇。
2．通过阅读理解如何用一般过去时的被动语态描述发明史。
3. 用一般过去时的被动语态谈论物品是何时被发明的。
4. 用一般过去时的被动语态对更广泛的发明进行描述。
【重点和难点】
学习重点:
重点单词及短语：sour，by mistake
学习难点:
用一般过去时的被动语态对更广泛的发明进行描述。
【课前预习】
一. 请根据中文意思写出下列重点单词。
1. 脆的；酥脆的 adj.______
2．咸的 adj. ______
3．酸的；有酸味的 adj. ______
4．顾客；客户 n．_______
二. 请认真阅读课本，找出下列重点短语。
5. 无意中；错误地 ____________
6．足够薄 _________-____
三. 请用以上重点短语完成下列句子。
7．你知道薯片是无意中被发明的吗？
Did you know potato chips were invented ________ _______?
8．顾客认为土豆不够薄。
The customer thought the potatoes were not _________ ________．
四. 根据句意及首字母提示完成单词。
9. I don’t like lemons because they are too s_______.
10. Lucy and Lily are twins. People often m______ them for each other.
11. For a restaurant, c__________ are the most important.
12. The fish was too s_______ because my mom put too much salt on it.
13. We often put the food into the f_______ to keep it fresh in summer.
【合作探究】
探究一、阅读课本，找出以下短语并标注和翻译。
1) in the box ________
2) by mistake ________
3) thin enough ________
4) salty enough ________
5) make sb. + adj. ________
6) in the end ________
7) a cook called… ________
8) cook for a long time ________
9) put …on _________
10) potato chips _________
探究二、浏览课本P45的1a,1b，回想更多有关食物及描述食物口感的词。
Flavor
Food
Crispy
Potato chips,
Sour
Sweet
Salty
探究三、Listen to the recording and answer these questions.
1) How was potato chips invented?
A. by accident B. by mistake C. by hand
2) When were they invented?
A. in 1863 B. in 1853 C. in 1893
3) Who invented them?
A. Whitcomb Judson B. Shen Nong C. George Crum
4) What did the custom think of the potato chips George cooked at first?
A. thick B. crispy C. salty
5) What did the custom order at the restaurant?
A. a plate of salad B. A plate of fried potatoes C. a bowl of soup
探究四、Listen again, choose T for true or F for false in 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 custom was happy in the end.
探究五、Listen to the recording a third time and fill in the blanks.
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 _______.One day, a customer came into the restaurant where George worked and _______a plate of fried potatoes. The cook called George cooked them for him. When the potatoes came, he said they were _____ too thick and sent them back to the kitchen. George was angry, so he cut the potatoes really, really_____, and he cooked them for a long time until they were _______. Finally he put lots of salt on them so they were really__________. He thought the customer would ______ them. However, after eating, the customer loved them and asked for ______. He told the other customers about them, and soon everyone was ordering thinly cut, crispy, salty potato chips.
After listening.
Role-play the conversation or retell the conversation.
探究六、知识链接
【词汇详解】
1.by mistake 意为“________________”
They sent the letter to me by mistake.
拓展：mistake 作名词 “错误，误会”。也可以作动词 “弄错，犯错”。
常用短语有：make a mistake 出错
You have made a mistake here.
mistake…for… 错把……当作……
They mistook him for his brother.
2. salty咸的
salty 形容词，意思为“咸的；含盐的”，是由名词“盐，食盐”加-y构成的形容词。
The boy didn’t have much for dinner because the dishes were too salty.
这个男孩晚餐吃得不多，因为菜太咸了。
【拓展】
“名词+-y”构成形容词:在英语中，很多名词后加-y可以构成形容词，如：
cloud—cloudy wind—windy rain—rainy sleep—sleepy sun—sunny
【针对练习】
---What nice weather！
---It’s_________.
A. sun C. cloud D. sunny
【句型详解】
1．Potato chips were invented by mistake. 炸薯条是无意中被发明的。
小小翻译官:
她误把盐放进了她的茶里。She put salt into her tea __ __．
2．The customer was happy in the end. 最后顾客很高兴。
小小翻译官:
最终我们到达了山顶。
We reached the mountain top _______ ________ ________．
在路的尽头向右转。
Turn right ________ ________ ________ ________ the road.
本周结束前这项工程将会完成。
The project will be finished _______ _______ _______ _________ this week.
【课时小结】
重点单词
1.crispy（adj.）脆的；酥脆的
2.salty (adj.) 咸的
3.sour（adj.） 酸的；有酸味的
4.customer（n.）顾客；客户
重点词组
by mistake; thin enough
重点句式
1.— Did you know potato chips were invented by mistake?
你知道土豆片是被错误地发明的吗？
—I didn’t know that. Who invented them?
我不知道，是谁发明的?
2. The customer thought the potatoes were not thin enough.
顾客认为土豆不够薄。
3. Finally he put lots of salt on them so they were salty enough.
最后他在它们上面撒了许多盐以使他们足够咸。
【达标检测】
一、选择合适的词填空
salty , sweet, mistakes, thin, called
1. Eating too much food is bad for your teeth.
2. There is a basketball star Curry in the NBA. Many basketball fans like him.
3. If you aren’t careful enough, you’ll make some in your homework.
4. Don’t add salt any more, it’s so that we can’t eat.
5. The ice is too .It’s dangerous to skate on it.
二．根据句意或首字母填上合适的词或短语
1. --Is the dish (salt) enough?
--Yes, it is.
2. I took your pen .( 错误地)
3. He got back home ___ __ .(最后)
4. I’m heavier than Jim means Jim is t _____________ than me.
5. My father works as a c ____________ in a restaurant.
【自我评价】
1. 本课我学会了什么？
__________________________________________________
2. 通过本课的学习，我还有哪些疑问？
______________________________________________
参考答案：
【课前预习】
1. crispy 2. salty 3. sour 4. customer 5. by mistake
6. thin enough 7. by mistake 8. thin enough 9.sour 10. mistake
11.customers 12. Salty 13. fridge
探究一
1. 在方框中 2. 错误地，无意中 3. 足够薄
4. 足够咸 5. 使某人…… 6. 最后
7. 叫……的厨师 8. 烹饪了很久 9. 把……放在……上 10. 薯条
探究二
Flavor
Food
Crispy
Potato chips, cracker；cookie
Sour
Lemon；grape
Sweet
ice cream；banana；apple；candy
Salty
salted egg；Beijing Duck；salt；salted fish
探究三 BBAAB
探究四 TFTFFT
探究五
was；invented；1853；ordered；cut；thin；crispy；salty；hate；more
探究六
【词汇详解】
1.错误地 2.D
【句型详解】
1. by mistake 2. in the end; at the end of 3. by the end of
【达标检测】
一、1.sweet 2.called 3.mistakes 4.salty 5.thin
二、1.salty 2.by mistake 3.in the end 4.thinner 5.cook