英语人教版九年级全册Unit 6 When was it invented 1 .doc

Unit 6 When was it invented? Section A 1 (1a-1c) 乐安镇中学 张赞一、Teaching aims： 1. Knowledge Objects1) Function: Talk about the history of inventions.2) Structure: Passive voice of the past tense.3) Target language:When was the telephone invented? It was invented in Who was it invented by? It was invented by2. Ability Objects1) Enable students to talk about the history of inventions and inventors by using the passive voice of the past tense.2) Train students listening and speaking skills with the target language.3. Moral ObjectsHelp students to know about the history of some important inventions and encourage them to think of things more often and try out their ideas.二、Teaching keys and difficulties1) Consolidate the passive voice of past tense.2) Talk about the history of inventions.三、Teaching procedureI. Warming up1. Show the learning aims of this class. 2. Inventions are very important in our daily lives. Especially the four great inventions in ancient China. Do you know what they are?. Presentation 1. Among the four inventions, which one is widely used in our daily lives? Who invented it? 2. Cai Lun invented paper. We can also say: Paper was invented by Cai Lun. Why is it? Can you explain?. GroupworkT: Cai Lun invented paper. is active voice. How can it turn into Paper was invented by Cai Lun? 1. Please discuss with your classmates in groups in 5 minutes. And give me the answer of your group later.2. Show the way from active voice into passive voice. And emphasis the pattern of be (was, were) +V-ed.IV. speak aloudTurn passive voice sentences into passive voice. Printing was invented by Bi Sheng. Compass was invented by Yellow Emperor. Who was it invented by?V. Guess and write1. Do you know what inventions they are? Can you guess?2. Ask students to prepare to do writing exercises. Look at the inventions and show the modern inventions. Writing down the sentences by using was invented byFor example: The first telephone was invented by Bell.3. Check answers in groups.VI. Listening1. Show the years of different inventions. Can you try to read the years?2. Make students understand the way of reading years.3. Look at 1b and match the inventions with the years. Then play the recording for the Ss to listen.4. Play the recording again and check the answers. VII. Pair workMake a conversation with your partner according 1b by using the target language of this class. The limit time is 5 minutes. e.g. A: When was the telephone invented? B: I think it was invented in 1876. VIII. Check and summary1. Edison invented these machines.（主动变被动语态）2. He bought six books yesterday.（主动变被动语态） 3. The cake was made last night.（划线提问）4. Linda invented the eraser.（划线提问）5. Inv