lock v.( 用锁)锁上,被锁住.n. 锁 invention n. 发明 crayon n. 彩色铅笔 thought n. 想法,看法,注意 silly adj. 愚蠢的,傻的 balloon n. 气球 gun n. 枪,炮 robot n. 机器人 keyboard n. 键盘 mark.

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lock v.( 用锁)锁上,被锁住.n. 锁 invention n. 发明 crayon n. 彩色铅笔 thought n. 想法,看法,注意 silly adj. 愚蠢的,傻的 balloon n. 气球 gun n. 枪,炮 robot n. 机器人 keyboard n. 键盘 mark n. 标记;记号,符号 V. 做记号,做标 记

I wish I could go into space some day. I hope your dream will come true. It’s said that he invented more than two thousand things during his life. Inventing is interesting and exciting and everyone can be an inventor. Functions

Unit 4 Amazing Science Topic 1 When was it invented ? Section D

Learning aims 1. 总结复习一般过去时 被动 语态的 用法 2. 了解古代和现代人是如何确定方位的。

What’s it used for? It’s used for locking the door. What’s it made of? It’s made of metal.

What’s it used for? It’s used for communicating.. What’s it made of? It’s made of plastic and metal. Where was it invented? It was invented in America. What method did you use to find your position 位置 ? Let’s use the GPS.

Read the passage and discuss the questions on Page How did the early explorers know where they were? 2. What’s the disadvantage of using the stars as guiding marks? 3. What is a GPS? Is it useful to use? 4. What do you think the GPS will be used for in the future? … They found out where they were by using stars. It didn’t work well when the weather was bad and the stars could not be seen. It is like a man-made star. We can use it at any time, in any place and in any weather to find out our position. It is very useful.

Key words explore________ explore our world_____ explorer______ mark find out______ direction _____ work well_____ as long as_____ the rest of the time_______ solve the problem _____ 在任何时间 在任何地点 _______ 在任何天气情况下 _____ study the shape of the earth _____ great invention_____ n. 标示,记 号,符号 v. 做记号, 做标记

Grammar Passive Voice ( Ⅱ ) The radio was invented by Guglielmo Marconi in When was the digital camera developed ? Where was it developed? What is a rocket used for? It was developed in the 1970s. It was developed in Japan. It is used for sending satellites or spaceships into space.

( ) 1. A big supermarket _____in our city last year. A. is built B. were built C. was built ( ) 2.Rice_______ in their hometown. A. grows B. grew C. is grown ( ) 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.Stamps ______by people for sending letters. A. used B. use C. are used ( ) 5.It was said that potato chips _____by mistake about one hundred years ago. A. were invented B. invented C. are invented C B C A C Grammar exercise

1.You are late, all the tickets __________(sell) out an hour ago. 2.This type of cellphone ____________(make )in Shenzhen last year. 3. I _________________ ( not invite) to yesterday’s party. 4. ________ those machines __________(buy) just now? 5. Many trees and flowers ______________(plant) in our school last year, and they made our school a beautiful garden. were sold were made wasn’t invited Were bought were planted

( ) 1.Hurry up, you ____ to answer the question. A. asked B. was asked C. are asked ( ) 2. Some stories _____the children by the teacher everyday. A. is told forB. are told for C. are told to ( ) 3._____that he has studied abroad for five years. A. It is saidB. It says C. That is said ( ) 4.The window ____ five minutes ago. A. is cleaned B. was cleaned C. can be cleaned ( ) 5.The children ______by the teachers at school. A. take care of B. are taken care C. are taken care of C C A B C Choose the best answer.

( ) 6. Letters ____by people for keeping in touch with each other many years ago. A. were used B. was used C. used ( ) 7. In some countries, tea _____before meals. A. is servingB. is servedC. served ( ) 8. This kind of picture ______by Jane A. is drawnB. was drawC. drawn. ( ) 9. I ______ten minutes to decide which sentence was right by the teacher. A. gaveB. was givenC. was giving ( ) 10. Teachers ______in every part of the world. A. are needing B. are neededC. need A B A B B

被动语态的构成 一般现在时: am / is / are + p.p 一般过去时: was / were + p.p 一般将来时: will / shall be + p.p 歌诀是:被动语态 be 字变, 过去分词跟后面. 被动语态的用法 歌诀: 谁做的动作不知道, 说出谁做的没有必要 ; 主动语态变被动语态的方法 歌诀是:宾变主, 主变宾, by 短语后面跟. 谓语动词变被动,be 后 “ 过分 ” 来使用.

1.People use radios to learn English in the past. _____________________________________________ 2.Lu Xun wrote these books. ______________________________________________ 3.People will plant trees next year. ______________________________________________ 4.A writer translate the book into many languages several years ago. _______________________________________________ 5.We can see stars at night. ________________________________________________ must 6.We mustn’t throw litter around. _________________________________________________ Radios were used to learn English in the past. These books were written by LuXun. Trees will be planted next year. The book was translated into many languages by a writer several years ago. Stars can be seen at night. Litter mustn’t be thrown around. Change the following sentences into Passive Voice.

We Learn: 1. Some words : mark, explorer 2. Some phrases: find out, in …, direction, as long as, work well, the rest of the time, be used to, the shape of 3. Some sentences: This method worked well at night as long as the weather was good and the stars could be seen. We can: 1. Use the passive voice of the simple past tense more properly. 2.Talk about new technology GPS.

Read 1a. Memorize the useful expressions and key sentences that we learn in this topic. Finish Section D in your workbook. Preview Section A of Topic 2.

Thank you