Unit 9 When was it invented（Section a 2a—2c）

(共23张PPT)
Unit 9 when was it invented
Section 2a—2c
New words---1-11
1.invent<>发明；创造 v
2.calculator<>计算机 n
3.be used for<>用来做……
4.scoop<>勺子， 用勺子舀n .v
5.adjustable<>可调节的adj
6.heel<>脚后跟；鞋跟 n
7.battery<>电池 n
8.operate<>操作；作业 v
9.battery-operated<>电池供电的
10.slipper<>拖鞋 n
11.heat<>加热；是变热 v
Inventions
1.Last class we invented MP8 and learned lots of inventions.
2.Today let’s see what inventions we can learn？---2a
battery-operated
slippers
heated ice
cream scoop
shoes with adjustable heels
Listen and number the inventions in the order you hear them.
1
2
3
Listen again and match the items in columns A, B and C.
Pairwork---2c
Let’s talk about the inventions we learned in 2a and 2b just now.
Ask and answer---3
1.What’s the name of the first invention
2.Who was (were) it (they) invented by
3. What is (are) it (they) used for
Imagine 发明者 我们班的任何一个人
Grammar focus
Ask and answer in half to half
cars / 1885 / Henry Ford / travel fast
名字 时间 发明者 用途
fridge / 1862 / Harrison / keep food fresh
名字 时间 发明者 用途
washing machine / 1858 / Smith / wash clothes
名字 时间 发明者 用途
Name, When, who, what use
The passive voice.
被动语态
被动语态的用法:
不知动作执行者时,常用被动语态.
My bike was stolen yesterday.
This car is made in American.
2. 不必要说出动作执行者时,常用.
Our blackboard is cleaned every day.
3. 为了突出强调动作的承受者时,常用被动语态.
The window is broken by our monitor.
主动语态变为被动语态的步骤:
把原主动句中的宾语转换为被动语态的主语.
2.把动词改为被动形式,即 “be + 过去分词” . 注意 be
动词要按新的主语的人称和数进行变化,时态要和原来
的主动语态的时态保持一致.
3. 原来主动语态句中的主语,如果需要,就放在by后面
以它的宾格形式出现. 如果没有必要就可以省略.其他的
成分 (定语,状语) 不变, 句式也不能变.
主动语态变被动语态的结构图:
Bell invented the telephone in 1876.
The telephone was invented by Bell in 1876.
主语
谓语动词过去时
宾语
时间状语
主语
谓语动词的过去分词
宾语
时间状语
被动语态的结构
陈述句：主语+be+动词过去分词…
例：Trees were planted by Jim yesterday.
一般疑问句：Be+主语+动词过去分词…？
例：Were trees planted by Jim yesterday
特殊疑问句：
特殊疑问词+be+主语+动词过去分词
例：When were trees planted by Jim
Who were trees planted by
请把下列主动句变为被动句。
They produced that kind of car.
The workers built a bridge over the river.
Mother tells me a story every day.
That kind of car was produced by them.
A bridge was built by the workers over the river.
I am told a story by Mother every day.
请把下列主动句变为被动句。
1.They produced that kind of car.
2.The workers built a bridge over the river.
3.Mother tells me a story every day.
That kind of car --------- --------by them.
A bridge ----- ------ by the workers over the river.
I ---- ---- a story by Mother every day.
homework