2. When was it invented? ( Period 1) Unit 9

3. What do you think a computer is used for? A computer is used for surfing the Internet. be used for + (doing) sth. 被用来 ……

4. computers watch movies send emails surf the Internet chat with friends look up information … --- They are used for sending emails / … --- What are computers used for? play computer games

5. The history of computer development When was it invented? The calculator was invented in 1971. Sir Clive Sinclair The note PC was invented in 1981. Steve Wozniak The personal computer was invented in 1976. Jef Raskin inventions inventors In what order （顺序） were they invented? The calculator was invented before the personal computer. The personal computer was invented after the calculator. The note PC was invented after the personal computer. ['kælkju:leitə] The calculator was invented by Sir Clive Sinclair. The personal computer was invented by Steve Wozniak. The note PC was invented by Jef Raskin. Who was it invented by?

6. A: I think the computer is the newest. B: I think the telephone was invented before the car. C: Well, I think the telephone was invented after the car. In what order do you think they were invented? Report: In our group, we think the … is the first invention, … is the second invention…

7. Listen and match the inventions with the dates. 1b _____ 1876 _____ 1885 _____ 1927 _____ 1971 _____ 1976 Listening Alice ____ was invented in ____. e a c b d

8. A: When was the … invented? B: It was invented in _____. 19761927 1876 1885 1971

9. Baird ( 约翰 · 贝尔德 ) Bell ( 亚历山大 · 贝尔 ) Wozniak and Jobs ( 沃兹奈克 和乔布斯 ) Sinclair ( 克里夫 · 辛克莱 ) Benz ( 卡尔 · 本茨 ) Match the inventions with the inventors. A: Who was the car invented by? B: It was invented by Benz.

10. 1885 1971 1976 Wozniak and Jobs SinclairBaird 1927 Bell 1876 Benz A: What’s this in English? B: It’s... 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 …

11. Report: My favorite invention is …. I think it is …. It was invented in … by …. It’s used for …. WhatWhenWhoBe used for 1903 The Wright brothers Traveling The plane

12. Summary 1. Key vocabulary: invent, calculator, be used for 2. Target language: What is a telephone used for? It’s used for talking with people. When was the telephone invented? It was invented in 1876. Who was it invented by? It was invented by Bell. 3. The Passive Voice

13. 1.Copy and memorize the new words ： invent, invention, inventor, calculator, personal computer 2.Do the exercise of Period 1 in your workbook. 3.Listen to tapes and have a dictation of the following sentences ( 听录音并听写下列句子）： What is a telephone used for? It’s used for talking with people. When was the telephone invented? It was invented in 1876. Who was it invented by? It was invented by Bell.

14. Find out the information about them and write down the sentences with Passive Voice like: gun powder paper making printing compass … was invented in … It was invented by… It’s used for … Four Great Inventions of China 选做题