九年级全Unit 9 When was it invented?Section A（1a-2c)period1

(共17张PPT)
Unit 9
When was it invented
Section A
Talk about the history of inventions.
The passive voice.
Language Goals:
Grammar Focus:
1b
Listen and match the inventions
with the dates.
a
b
e
d
c
1876
1885
1927
1971
1976
d
a
b
e
c
1c
1c
When was the telephone invented
I think it was invented in 1876.
Julie Thompson
battery-operated
slippers
Chelsea Lanmon
heated ice
cream scoop
Jayce Coziar and Jamie Ellsworth
shoes with adjustable heels
2a
Listen and number the inventions in
the order that you hear.
3
1
2
2b
Who was it / were they invented by
It was/ They were invented by
Chelsea Lanmon.
3b
What do you think is the most helpful
invention
I think the most helpful invention is
the light bulb.
Why is that
Well, it gives people more time to work
and play every day.
The passive voice.
被动语态
英语中动词有主动语态和被动语态两种语态. 主动语
态表示主语是动作的执行者,被动语态表示主语是动作的
承受者, 在被动语态中动作的执行者有时用by短语表示
出来.
被动语态的构成:
助动词be+ (及物动词的) 过去分词
一般现在时
一般过去时
am (is, are) + done
was (were) + done
{
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.
eg. 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.
eg. Rome was not built in a day.
3. 为了突出强调动作的承受者时,常用被动语态.
eg. Thousands of beaches are polluted (污染).
The passive voice.
被动语态
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.
The passive voice.
被动语态
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
The passive voice.
被动语态
主动语态改被动语态:
Bell
invented
the telephone
in 1876.
was
by
Students’ book P 70, part 4.