1. lesson 13 Lesson 13 刘青 Unit 4 前门外国语学校 刘青 Lesson 13

2. Discussion 1.What’s this? 2.What is it used for? An oven 3. What does it use to cook meals? It’s used for cooking. It uses the coal.

3. Word puzzle 1. It is an oven and it uses neither the coal nor the gas to heat food. And it’s very clean and convenient. It can heat or cook many meals in a short time. microovenwave

4. How to use the microwave oven ? First, he places__________ in the oven. Second, he programs________ for the correct time and then he switches on_______. In just a few minutes, the oven heats _______and then he takes _________ out of the oven and he can serve________. the food the oven the food

5. First, _______is placed in the oven. Second, ________is programmed for the correct time and then______ is switched on. In just a few minutes, ______is heated and then ______is taken out of the oven and _______is served. How to use the microwave oven ? the oven the food the oven

6. Words and expression: a) place 炉子 b) coal 打开开关 c) program 放置 d) switch on 煤 e) oven 服务 f) microwave 设置 g) serve 微波

7. Read and discuss: 1. What do microwave ovens use to heat food? 2. Why do microwave ovens work quickly? 3. What kind of plates do we often use? 4. Why doesn’t the plate get hot after heating? Microwave ovens use microwaves to heat food. Because all the food is heated at the same time. Because microwaves are absorbed by the food but they are not absorbed by things like plastic or glass. We often use plastic or glass plates.

8. True or False: 1. In a microwave oven, the microwave are absorbed by the food. 2. When the microwave are absorbed, they are turned into heat. 3. Microwaves are absorbed by things like glass and plastic. 4. In a microwave oven, the outside of the food is cooked first, then the inside. T T F F

9. Finish the diagram in 1.2 The foodis placedin the oven The oven is programmed is heated is switched on The foodis taken out for the correct time is served on the table of the oven in the oven is placed is programmed

10. The microwaves are absorbed by the food are turned into heat The food is heated at the same time The microwaves are absorbed by the food are not absorbed by things like plastic or glass A B C

11. be+ 动词的过去分词 (passive voice) __be used by sb __be used for doing sth. __be placed in/on places __be programmed for some time __be programmed at certain time __be switched on __be absorbed by sb./ sth __be taken out of some places __be turned into sth. f. 被某人使用 c. 被放在某地 a. 被设定在某个时间 i. 开关被打开 e. 被某人 / 某物吸收 d. 被从某地拿出 b. 被变成某物 g. 被设定成多长时间 h. 被用做干某事 a b c d e f g h i

12. 1. The clock________________12:00. 1.The gun ___________policemen. 2. The gun _____________ shooting. (use) 2. The clock _______________5 minutes. (program) is used by is used for is programmed at is programmed for

13. (place) （ absorb ） 1. The books ______________on the shelf. 2. The sunshine _______________by the tree. are placed is absorbed

14. 1. The milk ______________the fridge. (take out of) 2. The wind _________________ the power.( turn into) is taken out of is turned into

15. Group work: a machine for doing homework a machine for making breakfast In groups, design, draw and describe a new invention, use the phrases in the textbook. _______________________________________________ It is like … ， it’s used for doing