Unit 9 When was it invented（Section A 1a—1c）

(共21张PPT)
Unit 9 when was it invented
Section A 1a—1c
提示：
1. take some things in the classroom.
2. ask students what are these things.
3. then invent a useful thing with the things.
4. ask the students what it is Guess
5. tell the answer MP8
What’s the name of it
1.invent---v
2.inventor---n
3.invention---n
What’s the use
4. can calculate---v
5.name---calculator---n
6.calculation---n
7.translate
8.translator
9.translation
250+250=
W.C--- means
Questions---4
1.What’s the name of the thing (invention)
2.When was it invented
It was invented just now.
3.Who was it invented by
It was invented by Mr Liu.
4.What is it used for
It is used for translating, calculating, flying , making a call and learning English.
be used for doing … 被用来做…
It is called MP8
Make sentences:
The telephone was invented before the car.
The car was invented after the telephone.
5
2
4
1
3
1a---number the pictures
Let’s look and talk
name ---when --- who
When was it invented
It was invented in 1885
Who was it invented by
It was invented by Karl Benz.
Karl Benz.
car
1885
light bulb
name ---when --- who
It was invented in 1879
Who was it invented by
It was invented by Edison.
Edison
light bulb
When was it invented
Let’s look and talk
1879
1b
Listen and match the inventions
with the dates.
a
b
e
d
c
1876
1885
1927
1971
1976
d
a
b
e
c
Pairwork
Read the model and then make your own conversation
A: What is this called in English？
B: It is called the telephone.
A: When was the telephone invented
B: It was invented in 1876.
A: What is it used for
B: It is used for talking with others.
A : Who was it invented by
B: It was invented by Bell.
be used for doing … 被用来做…
1876
Bell
Pairwork
telephone
When
Who
What
Talking with the people far away.
Beld
1927
Tv set
Watching and learning many things in the world.
When, who, what use
car
travelling.
in 1885
Carl Bens
When, who, what use
1971
Kelif
calculator
calculating
When, who, what use
The passive voice.被动语态
MP8
It was invented just now.
It was invented by Mr Liu.
It is used for translating, calculating, flying and making a call.
结构：be + V. pp 即.be+动词过去分词…
The passive voice.
被动语态
主动语态改被动语态:
Bell
invented
the telephone
in 1876.
was
by
主动句与被动句之间的转换
I cleaned the blackboard. 主语 +谓语动词 + 宾语
The blackboard was cleaned ( by me ) 主语 +谓语动词 +介词+ 宾语
将下列句子由主动句变为被动句或由被动句变为主动句：
Zheng Jie invented this pen.变被动句
.
2) Teachers allow students to drink in class.
This pen was invented Zheng Jie.
Students are allowed to drink in class.