青海省师大二附中九年级英语《Unit9 When was it invented》课件.ppt

Unit 9When was it invented?Section APeriod TwoWords and expressions bulb light bulb microwave microwave ovenn. 电灯泡；电灯电灯泡；电灯电灯泡电灯泡n. 微波微波微波炉微波炉What is it / are they used for?It’s an annoying invention.Because it wakes me up when I’m sleeping. alarm clockalarm clockI think computer is the most helpful invention. Because it helps me search the information that I need. computercomputerWhat do you think is the most helpful or annoying invention?3aPairworkMake 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?A: What is this? B B: It is an alarm clock. : It is an alarm clock. A A: What : What is is it it used forused for? ?B B: It : It is used foris used for waking people up in waking people up in the morning.the morning.A A: Do you think it is annoying?: Do you think it is annoying?B B: Sometimes, when I want to go on : Sometimes, when I want to go on sleep.sleep.Dialogue 1:Dialogue 2:Dialogue 2:A A: What is this? : What is this? B B: It is a light bulb. : It is a light bulb. A A: What : What is is it it used forused for? ?B B: It : It is used foris used for giving light. giving light.A A: Do you think it : Do you think it is helpfulis helpful? ?B B: Yes, I think so. Because I always do : Yes, I think so. Because I always do homework and read books in the homework and read books in the evening by its light. 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.3bPairworkA: What do you think is the most A: What do you think is the most annoying invention? annoying invention?B: I think the most annoying invention B: I think the most annoying invention is the air-conditioner. is the air-conditioner.A: Why is that?A: Why is that?B: Well, I feel uncomfortable in the B: Well, I feel uncomfortable in the room with an air-conditioner. room with an air-conditioner.GROUPWORGROUPWORKKWhat would you do if you are alone on What would you do if you are alone on a tiny island?a tiny island?Imagine that you are alone on a tiny Imagine that you are alone on a tiny island. Choose five inventions you would island. Choose five inventions you would like to have on the island with you. Tell like to have on the island with you. Tell the group what you choose and why.the group what you choose and why.A: I’d like to have a radio because I could listen to music all day.B: Yes, but that’s not going to help you leave the island. I think it would be better to have…A: I’d like to have some matches because I could light a fire to keep warm.B: Yes, but that’s not going to help you leave the island. I think it would be better to have a cell phone.Dialogue 1:Dialogue 2:A: I’d like to have a telescope because I could look far.B: Yes, but that’s not going to help you leave the island. I think it would be better to have a signal lamp.用所给单词的适当形式填空。

用所给单词的适当形式填空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 。