Unit 9 When was it invented? Section B Period 1

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1 Unit 9 When was it invented? Section B Period 1

2 What do you think is the most useful/annoying invention? Why is that?
Brain Storm What do you think is the most useful/annoying invention? Why is that?

3 Describe how food tastes.
crispy and salty

4 sour

5 sweet

6 sweet

7 -What kind of food do you like?
-I like food that tastes… bitter 苦的 hot 辣的 awful 可怕的 nice 好的 delicious 美味的 salty咸的,含盐的 sweet甜的 crispy易碎的, 脆的 sour酸的, 酸味的

8 1b Write the name of a different food after each word.
sweet ___ crispy ____ salty ______ sour ___ apple orange cake honey candy French fries salad lettuce Popcorn potato chips pizza potato chips dumplings grape vinegar orange pickle strawberry

9 Do you like potato chips?
How do they taste?

10 The history of chips When were potato chips invented?
Who were potato chips invented by? How were potato chips invented?

11 Listening (2a, 2b: P71) Listen and choose “T” or “F”.
The potato chips were invented by mistake. 2. They were invented in 1863. 3. The customer thought the potatoes weren’t thin enough. T F T

12 4. The customer said they weren’t
salty enough. 5. George wanted to make the customer happy. 6. The customer was happy in the end. F F T

13 The history of potato chips
Listen again. Complete the sentences. _____________ that potato chips were invented by mistake? Chips ______ _________ by a chef called George Crum. They were invented in ______. George Crum cooked them for a long time until they ___________ And he sprinkled lots of salt on them so they were __________. Did you know were invented 1853 were crispy really salty

14 Explanation 1. The custom said they weren’t salty enough. 这个顾客说菜不够咸。
(1) said 后是宾语从句, 省略了that。当 宾语从句主句用一般过去时, 从句也要 用过去的某种时态。 He asked me whom I was waiting for. 他问我在等谁。

15 但enough 修饰名词时, 可以放在名词之前, 也可以放在名词之后。如:
I have enough money to buy it. ( I have money enough to buy it.) 2.The potato chips were invented by mistake. 薯片是无意中被发明的。 mistake 做名词, 意为 “弄错, 误解”

16 You have made a foolish mistake.
你犯了一个愚蠢的错误。 mistake 作动词, 意为 “弄错,误解” She didn’t speak very clearly so I mistook what she said. 她讲的不清楚, 所以我误解了她的话。

17 by mistake 意为 “错误地,无意地” I took his backpack by mistake. 我错拿了他的书包。 He put salt in her cup of tea by mistake. 他错把盐放进她的茶里。

18 Pairwork 2c Role play the conversation of potato chips. Use the information from 2a to 2b. A: Did you know potato chips were invented by mistake? B: Wow, I didn’t know that. Who invented them? A: …

19 Homework Find out the history of tea.

20 Thank you for listening!