Unit 4 Amazing Science Topic 1 When was it invented? SectionA被动语态总结课件（21张）

课件21张PPT。Unit 4 Amazing Science Topic 1 When was it invented ?被动语态总结学习目标1、复习总结一般现在时和一般
过去时的被动语态。
2、了解一般将来时的被动语态。
A：What’s it used for?
B：It’s used for listening to music.
A： What’s it made of?
B： It’s made of plastic.
A： Where was it invented?
B： It was invented in Korea.
A： When was it invented?
B： It was invented in 1998.Ask and answerA：What’s it used for?
B：…communicating easily.
A： What’s it made of?
B： … plastic and metal.
A： Where was it invented?
B： …in America.
A： When was it invented?
B： …in 1973.Pair workIt’s used for communicating easily.
It’s made of plastic and metal.
It was invented in America.
It was invented in 1973.
Disneyland is enjoyed by millions of
people from all over the world.
English is spoken as the main language
in America.
It is also widely used throughout the
world now.
Read and find被动语态(Passive Voice ) 英语动词的语态有两种：
⑴主动语态：表示主语是动作的执行者?
⑵被动语态：表示主语是动作的承受者(常常没在有必要指出动作的执行者情况下使用)。
结构：be + done The radio was invented by Guglielmo Marconi in 1895.
It was developed in the 1970s.
It was developed in Japan.
It is used for sending satellites or spaceships into space. is spoken byShe speaks Chinese. is spoken by He speaks English.EnglishEnglish.Hehim.ChineseChinese.Sheher. 被动语态(Passive Voice ) be + done 主动语态： 主语 + 动词 + 宾语
被动语态： 主语 + be + 过去分词 + by + 宾语
一般现在时被动结构：is/are doneMany people use computers.Computers _____ ________
by _______ _________.The workers plant trees in the garden last Sunday.Trees _____ _______ in the
garden ____ the workers last
Sunday.are usedmany peoplewere plantedbyCan you try ？1.Many people use computers.Computers _____ ________
by _______ _________.2.The workers plant trees in the garden.Trees _____ _______ in the
garden ____ the workers.are usedmany peopleare plantedby3.Lots of foreigners enjoy Beijing Opera.Beijing Opera_______________________is enjoyed by lots of foreigners.4.Many visitors visit the Great Wall every year.The Great Wall _____________________________is visited by many visitors every year.Exercise1、Laptap was invented in 1985.(改为否定句)
2、Digital cameras were developed in the 1970s.
(改为否定句)
Laptap wasn't invented in 1985Digital cameras weren't developed in the 1970s.一般过去时被动结构：was/were done否定句句式：主语 + was/were + not +其他请把下面句子变成否定句：SummaryExercise1、The trees were planted last year.(改为一般疑问句,并作肯定和否定)
2、Our new teaching building was completed last month.（同上）
Were the trees planted last year?Yes,they were./ No,they weren't.Was Our new teaching building completed last month ?Yes,it was./ No,it wasn't.一般过去时被动结构，一般疑问句句式：
Was/Were + 主语 + done +其他？请把下面句子变成一般疑问句：Summary聚焦一般过去时的被动语态
结构:助动词(was/were)+及物动词的过去分词
1.肯定句式 ：主语+was /were+v.-ed
2.否定句式 ：主语+was/were + not+v.-ed
3.一般疑问句式： Was /Were+主语+vt.-ed
4.特殊疑问句式：疑问词W/H+was/were+主语+v.-edLet’s sum up together.Summary1. Some people destroy the environment.
2.He doesn’t water the flowers every day.
3.Does a large population cause many problems?
4.They clean their classroom every day.
Exercises
Change the following sentences into the passive
voice sentences.The environment is destroyed by some people.The flowers are not watered by him every day.Are many problems caused by a large population? Their classroom is cleaned by them every day.( )1. Each year quite a lot of food ____ around the world.
It’s really time for us to do something.
A. was wasted B. is wasted C. wasted D. will be wasted
( )2. Many buildings in Lushan ____ in the earthquake on April 20th. It will surely be built more beautifully.
A. have destroyed B. are destroyed
C. were destroyed D. are destroying
( )3. Today, computers are really helpful. They
___everywhere.
A. use B. are used C. used D. were used
( )4. Chinese ______ by more and more people from all over the world today.
A. learn B. learned C. is learned D. was learned
( )5. Hot water ______ in the students’ flats from 5p.m. to 7 p.m. now.
A. supplies B. is supplied C. supplied D. was supplied 一般现在时态和一般过去时态的被动语态BCBCBSpaceship V was sent into space in 2003. More spaceships will be sent into space in the future. Many spaceships are sent into space by China. be+ done 一般现在时态被动语态was/were + done
一般过去时态被动语态will be +done 一般将来时态被动语态It’s reported that Daimiao Culture Square ______ _______ _________(build) in Tai’an next year.
I’m sure that stricter rules to control cigarette smoking _______ ______ _______ (make) very soon.
The task _____ _____ _______(finish) in an hour. Then we can go home and have a good rest.
The 12th National Games ____ ____ ___(hold) in Shenyang next year. Why not prepare yourself to be a volunteer? Can you try?will be builtwill be made will be finishedwill be heldGrammar 一般将来时态被动语态
will be +过去分词, will是第一助动词，否定句，疑问句都围绕will进行变化。e.g.
(1) He will be met at airport by his friend.
(2) Will an English contest be held next Saturday afternoon?
(3) You will not be allowed to go out if you don’t finish your homework. ( ) 1. A big supermarket _____in our city last year.
A. is built B. were built C. was built
( ) 2.Could you tell me who the radio ____ by?
A. invents B. invented C. was invented
( ) 3. Many trees and flowers _____ in our school last year.
They made our school more beautiful.
A. have planted B. were planted C. planted
( ) 4.The children ____ swim last month and they can swim
very well now.
A. are taught B. were taught C. were taught to
( ) 5.It is said that potato chips _____by mistake about one
hundred years ago.
A. were invented B. invented C. are invented
CBCACGrammar exercise
1.People use radios to learn English in the past.
_____________________________________________
2.Jack will show me the photo.
______________________________________________
3.They have raised much money for the Project Hope.
______________________________________________
4.I often hear Mary sing English songs at home.
_______________________________________________
5.We mustn’t throw litter about.
________________________________________________
6.People can visit planets like Mars.
_________________________________________________
Radios were used to learn English in the past.The photo will be shown to me. Much money has been raised for the Project Hope.Mary is often heard to sing English songs at home.Litter mustn’t be thrown about.Planets like Mars can be visited.Change the following sentences into Passive Voice.Thank You !