八年级英语A dangerous servant教案2

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Chapter 4 A dangerous servant
一、词汇
1. dangerous adj. 危险的 danger n. 习惯用语：in danger 处于危险中
2. servant n. 佣人、仆人
serve v. 接待，服务 service n. 服务
3. electricity n. 电
electric adj. 电的；用电的 electrical adj. 用电的；与电有关的
4. but sth. in packets 成包买
习惯用语：buy sth.for...= spend ... on sth.
5. flow(into， through， etc.sth.) v. 流；流动
6. explanation n. 解释；说明
explain v. 解释
7. invisible adj. 看不见的，不可见的
反义词：visible adj. 看得见的
vision n. 视力；视野
have good / normal vision 视力好 / 正常
8. energy n. 能量；能
heat energy 热能 light energy光能
9. connect v. （使）连接；联结
习惯用语：connect A to / with B
connect A and B
10. bury(buried， buried)v. 把（某物）掩藏在地下
习惯用语：bury one‘s nose in a book 埋头看书
11. power n. （1）电力供应 a power station 发电厂；发电站 （2）能力
powerless adj. 无能为力的 be powerless to do sth.
powerful adj. 强有力的 powerful weapons 强大的武器
12. contain v. 包含；含有；容纳
container n. 容器
13. chemical （1）n. 化学物质 （2）adj. 化学的
chemical changes 化学变化
chemistry n. 化学
chemist n. 化学家；药剂师
14. produce v. 生产
product n. 产品 meat products 肉制品
production n. 生产；产量

二、句式
1. Although electricity is much more dangerous than water， ...
尽管电比水要危险得多，......
（1）although conj. = though 虽然；尽管
（2）much more dangerous than ...
much用来修饰比较级
可以修饰比较级的词much， a lot， far， ......得多 a little， a bit， ......一点儿
even 甚至， still 仍然
2. Can you tell me what it looks like? 你能告诉我它看起来像什么吗？
3. We call the thick wires cables. 我们把粗电线叫做电缆。
4. We can change it into forms of energy that we can see， hear or feel.
That we can see， hear or feel 是定语从句，修饰energy。that 为关系代词，在定语从句中做宾语。

三、语法
May I / we... ？这一类疑问句的肯定回答为 Yes， please. 或 Certainly；
否定回答为 Please don‘t. 或 No， you mustn‘t.

随堂反馈
I. Choose the best answers：
( )1. John， look at the time. ＿＿＿＿＿＿＿ you play the piano at such a late hour?
A. Must B. Can C. May D. Need
( )2. There ＿＿＿＿＿＿be any difficulty about passing the road test since you have practiced a lot in the driving school.
A. mustn‘t B. must C. shouldn‘t D. needn‘t
( )3. Excuse me. ＿＿＿＿＿＿ you please pass me that cup?
A. Do B. Should C. Would D. Must
( )4. We forgot to bring our tickets， but please let us enter， ＿＿＿＿＿＿?
A. do you B. can we C. will you D. shall we

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八年级英语A dangerous servant教案2