当前位置 :项目首页 > 资源分享 > 正文

Unit 6  When was it invented ?

Section A 4a—4c

【学习目标】
总结一般过去时态被动语态

【学习重点难点】
运用一般过去时态的被动语态完成相应练习

一、 导入（启发探究  3分钟）
SA: When was the car invented ?
SB: It was invented in 1885.
SA: When were electric slippers invented?
SB: They were invented last year.
SA : Who were they invented by?
SB: They were invented by Julie Thompson.
SA: What were they used for?
SB: They were used for seeing in the dark.


Thomas /tɔməs/ Watson /wɔtsən/托马斯 • 沃森  p.44


Questions:
1. What invention do you like best? Why?
______________________________________________
2. What invention do you hate a lot?
______________________________________________
3. List as many of them as you can.


    “二十世纪最糟糕的发明是什么 ? ”就是人们每天大量使用的塑料袋。 诞生于上个世纪三十年代的塑料袋，其家族包括用塑料制成的快餐饭盒、包装纸、餐用杯盘、饮料瓶、酸奶杯、雪糕杯等等。这些废弃物形成的垃圾，数量多、体积大、重量轻、不降解，给治理工作带来很多技术难题和社会问题。 
比如，散落在田间、路边及草丛中的塑料餐盒，一旦被牲畜吞食，就会危及健康甚至导致死亡。填埋废弃塑料袋、塑料餐盒的土地，不能生长庄稼和树木，造成土地板结，而焚烧处理这些塑料垃圾，则会释放出多种化学有毒气体，其中一种称为二噁英的化合物，毒性极大。


二、自学（自主探究  6分钟）
1、拼读、记忆单词
fridge /fridʒ/ n. 冰箱              p.44 
translate /trænsleit/ v. 翻译         p.44 
lock /lɔk/, /la:k/ v. 锁上；锁住      p.44 
earthquake / ə:(r)θkweik/n. 地震  p.44 
sudden /sʌdən/ adj. 突然（的）    p.44 
all of a sudden  突然; 猛地       p.44
biscuit /biskit/  n. 饼干          p.44
cookie/kuki/ n.  曲奇饼干        p.44
instrument /instrumənt/ 
n. 器械； 仪器；工具           p.44


2、【新词自查】根据汉语提示完成单词。
1. The boy lost his parents during the last year’s earthquake (地震).
2. The students were asked to translate (翻译) the story into English.
3. The police found the lost boy under the destroyed house through an instrument (仪器)。
4. I only have some biscuits (饼干) and a glass of milk every morning.
5. If you can’t eat all these fruit , you may put some into your fridge (冰箱).


3、阅读一般过去时态的被动语态句子，感悟其结构、用法、句型变化。
1. ---When was the zipper invented?
  ---It was invented in 1893.
---拉链是什么时候发明的？
 ---它是在1893年被发明的。
2. ---Who was it invented by? 
---It was invented by Whitcomb Judson
.---它是由谁发明的？
--它是被惠特科姆.贾德森发明的。
3. The fridge was sold at a low price. 
这个冰箱被以低价卖掉了。
4. The students were told not to eat or drink in class. 学生们被告知在课堂上既不吃或喝任何东西。


三、交流（合作探究  10分钟）


完成教材4a-4c的任务
1. 要求学生翻开课本P44，参照4a所提供的信息和例句，用被动语态改写句子.给出5分钟的时限，并请另4位同学在黑板上改写，全班集体核对答案。（5分钟）
参考答案
2. My camera was stolen from my hotel room by somebody.
3. Where were these photos taken?.
4. We are advised by our parents not to go out alone.
5.The book was translated by different writers into different languages.
2.用所给单词的正确形式完成4b句子。给出5分钟的时限，并请另个5位同学朗读句子，全班集体核对答案。
1. were invited 2. were brought 3. was locked, rang 
4. were told, broke  5. were eaten, asked
3. 先浏览4c的短文，确定空格处的动词是用主动形式还是被动形式，然后用动词的正确形式填空完成短文。给出5分钟的时限，并请1位同学朗读短文，全班集体核对答案。
1. was invented 2. was born 3. worked 4. learned. 
5. was invented 6. was said 7. is used
4. 小结训练。要求学生在规定的时间内完成一个小练习。并请若干学生给出自己的答案。有错误的话及时解决纠正。（2分钟）
用所给词的适当形式填空。
1. This instrument is used for playing (play) music in class.
2. How many magazines were borrowed (borrow) from the library today?
3. Edison was a great inventor. He had over 1.000 inventions in his life.(invent). 
4.A picture was put (put) on the blackboard before class.
5. Plates and dishes weren’t washed (not wash) after supper yesterday.
  
四、总结（引深探究  15分钟）


重点单词
1. low adj.低的，矮的； 
2.translate v. 翻译； 
3.lock v.锁上；n. 锁；
4.sudden adj. 突然的；
重点短语
1. at a low price 以一个很低的价格 
2. take these photos 拍这些照片 
3. go out alone 单独外出 
4. translate the book into different language 
 把书翻译成不同种的语言
5. all of sudden突然 
6. work on 从事，进行