Unit 9 When was it invented?Section A（3a-4)period2

课件21张PPT。Unit 9 When was it invented?Section A 3a---4RevisionWhat inventions have you remembered?1976Wozniak and Jobs1971SinclairBaird1927Bell18761885Benz A: What is this called? B: It is called...
A: When was… invented? B: It was invented in ...
A: Who was… invented by? B: It was invented by ...
A: What is … used for? B: It is used for …Jobs2007Chelsea LanmonJulie
ThompsonJayce Coziar and
Jamie EllsworthWhat other inventions do you know?BrainstormList other inventions as many as possible.
Think of the using of them.
alarm clockIt’s a battery-operated machine.Guessing gameSometimes it’s really annoying if people want to go on sleeping.It wakes people up every morning.---What is the alarm clock used for?---It is used for ________________ . waking people up ---What do you think of it?---I think it’s ____________________ .annoying if I want to go on sleepinghelpful or I will get up lateIt’s an electric machine that looks like a box.Guessing gameIt’s used for cooking food.It’s also used to heat the cold food in a few minutes.---What is the microwave oven used for?---It is used for ________________ . cooking food ---What do you think of it?---I think it’s ____________________ .heating the coldhelpful beause it makes
my life easier and quickermicrowave oven
They are made of glass.Guessing gameThey are used for seeing in the dark.They give people more time to work or play every day.---What are the light bulbs used for?---they are used for ________________ . seeing in the dark ---What do you think of it?---I think it’s ____________________ .helpful beause it gives
people more time to
work or play every daylight bulbsBecause of some great inventions, our life becomes much easier and more comfortable.ConclusionSome of the inventions are really helpful, however, some are kind of annoying.telephonealarm clockplanecomputerlight bulbmicrowave oventelevisionatomic bombmissile 导弹gun 枪支chemical weaponsplastic bagsMake a list of five helpful inventions and five annoying inventions.3a化学
武器原子弹A: What do you think is the most helpful invention?
B: I think the most helpful invention is the light bulb.
A: Why is that?
B: Well, it gives people more time to work and play every
day.PairworkA: What do you think is …?
B: I think … is ….
A: Why is that?
B: Well, …What do you think is the most helpful/ annoying inventions?A survey Julie thinks the computer is the most helpful invention because it helps her search the information that she needs. But she also thinks …the is the most annoying invention because…Report Juliecomputer Imagine that you are alone on a tiny
island.Choose five inventions you would like to have on the island with you .Tell the group of four what you chose and why.Groupworkbinoculars1._____________________________________
2._____________________________________
3._____________________________________
4._____________________________________
5._____________________________________A: I’d like to have a radio because I could listen to music all day. B: Yes, but it’s not going to help you leave the island. I think it would be better to have…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1.I open the door.The door is opened by me.2.He often helps homeless people.Homeless people are often helped by him.3.I handed out some papers just now.Some papers were handed out by me just now.主动语态:主语是动作的执行者。
被动语态:主语是动作的承受者。
被动语态结构为：(主动语态)(主动语态)(主动语态)(被动语态)(被动)(被动语态)be+过去分词将下列句子变为被动语态。Revision:WritingA: Look! This looks so interesting!
B: Ah, it’s a great invention of China.
A: Really? When ______ it _________?
B: I think it ______ _________ in Han Dynasty.
A: What ______ it ______ for?
B: Guess!
A: ______ it ______ for holding water?
B: No. It ___ _____ for testing earthquakes（地震）.
A: Wow, it’s really amazing! wasinventedwasinventedwasusedWasusedwasused(汉朝)
将下列句子改为被动语态
1. People use metal for making machines.
Metal　　 for making machines.
2. We don`t use recorders in math class .
Recorders by in math class .
3.Do they use it as a table?
it as a table by ?
4.She grows flowers on a farm.
Flowers a farm.
5. Do they teach Japanese in their school ?
Japanese in their school?isusedaren’tusedusIsusedthemaregrownonIstaughtEXERCISES6.They write these books in French.
7.The students clean the classroom every day.
8.We make shoes in our factory.
9.Xiaoming drew the picture yesterday.These books are written by them in French.The classroom is cleaned by the students every day.Shoes are made by us in our factory.The picture was drawn by Xiaoming yesterday.10. He asked me to speak loudly.
I speak loudly .
11. The teacher often makes us
do lot of homework .
We often lots of
homework by the teacher .
12. My father bought me a new bike yesterday.
A new bike me yesterday.
I a new bike yesterday.was asked to by himaremade to do was bought forwas boughtby my fatherHomework:Write a short article about “1 or 2 Important Inventions In My Life”. Tell us, what are the most important inventions in your daily life? Write more information about them and the reasons.