青海省師大二附中九年級(jí)英語(yǔ)《Unit9 When was it invented》課件

Unit 9When was it invented?Section APeriod TwoWords and expressions bulb light bulb microwave microwave ovenn. 電燈泡；電燈電燈泡；電燈電燈泡電燈泡n. 微波微波微波爐微波爐What is it / are they used for?Its an annoying invention.Because it wakes me up when Im sleeping. alarm clockI think computer is the most helpful invention. Because it helps me search the information that I need. computerWhat do you think is the most helpful or annoying invention?3a3aPairworkMake a list of five helpful inventions and five annoying inventions.Helpful inventions: vacuum cleaner, soundproof door and window, car, computer, fax machineAnnoying inventions: air-conditioner, truck, telephone, junk food, ice cream oral practiceSentence pattern:What is this in the picture?What is it used for?Do you think it is helpful / annoying?A: What is this? B: It is an alarm clock. A: What is it used for?B: It is used for waking people up in the morning.A: Do you think it is annoying?B: Sometimes, when I want to go on sleep.Dialogue 1:Dialogue 2:A: What is this? B: It is a light bulb. A: What is it used for?B: It is used for giving light.A: Do you think it is helpful?B: Yes, I think so. Because I always do homework and read books in the evening by its light.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.3b3bPairworkA: What do you think is the most annoying invention?B: I think the most annoying invention is the air-conditioner.A: Why is that?B: Well, I feel uncomfortable in the room with an air-conditioner.GROUPWORKWhat would you do if you are alone on a tiny island?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 what you choose and why.A: Id like to have a radio because I could listen to music all day.B: Yes, but thats not going to help you leave the island. I think it would be better to haveA: Id like to have some matches because I could light a fire to keep warm.B: Yes, but thats not going to help you leave the island. I think it would be better to have a cell phone.Dialogue 1:Dialogue 2:A: Id like to have a telescope because I could look far.B: Yes, but thats not going to help you leave the island. I think it would be better to have a signal lamp.用所給單詞的適當(dāng)形式填空。用所給單詞的適當(dāng)形式填空。1. What do you think is _ (useful) one of the three?2. This machine _ (use) to make noodles.3. I think the computer is a great _ (invent).4. Computers can be used for _ (study) English.5. A TV set gives people more opportunities _ (enjoy) themselves.the most usefulis usedinventionstudyingto enjoy