九年级英语 unit9 When was it invented_ sectionA(3a-4) 课件 人教新目标版.ppt

Unit 9 when was it invented?Period Two What is it?What is it used for?(call sb up)Its used for calling sb up.telephone telephone 18761876What are they?What are they used for?(see in the dark)Theyre used for Seeing in the dark.battery-battery-operated operated sleeperssleeperslast yearlast yearWhat is it?What is it used for?(scoop really cold ice cream)It is used for scooping really cold ice cream.heated ice heated ice cream cream scoopscoopa few years agoa few years agoWhat is it?What is it?What is it used for?(tell the time)It is used for telling the time.1788alarm clock What is it?What is it?1946 microwave ovenWhat is it used for?(heat cold food)Its used for heat ing cold food.What are they?What are they?What are they used for?They are used for giving light.18791879light bulbslight bulbsHow many other inventions do you know?puter2.3.4.New inventions are invented all the time.Inventions have changed our lives a lot.Most of the inventions are helpful or interesting,but some of them are annoying.For example,I think the light bulb is helpful,but the alarm clock is annoying.A:A:What do you think What do you think isis helpful/annoyinghelpful/annoying?B:I think _ B:I think _ helpful/annoyinghelpful/annoying.PairworkPairwork(3a)(3a)3aMake a list of five helpful inventions and five annoying inventions.Helpful inventionsAnnoying inventionsExample _telephone1Example _alarm clock122334455plane,carcameralight bulbpaper,elevatorcomputer,radio mobile phonetruckcomputer games junk foodcigarette3bWhat do you think is the most helpful/annoying(令人恼怒的令人恼怒的)invention?Name HelpfulinventionsWhy Annoying inventionswhyHelpful inventionsAnnoying inventionsExample _telephone1Example _alarm clock122334455plane,carcameralight bulbpaper,elevatorcomputer,radio mobile phonetruckcomputer games junk foodcigaretteUseful expressions:A:What do you think is the most helpful/annoying invention?B:I think the most helpful/annoying invention isA:Why is that?B:Well,it gives/helps peopleDo you think the computer is the Do you think the computer is the most helpful or annoying invention?most helpful or annoying invention?I think the is the most helpful invention because it.It was invented in.It was invented by.I thinkthe is the most annoying invention becauseConclusion:InventionsWhy1.radiolisten to music all day2.3.4.5.Imagine that you are alone on a tiny(小的小的)island.If you can only take five inventions,what would you take?Why?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 of four what you chose and why.Then give a report.A:Id like to have a radio because I could listen to music all day.B:Yes,but its not going to help you leave the island.I think it would be better to haveknifeflashlightgunSample dialogue:Sample dialogue:A:A:Id like to have a radio because IId like to have a radio because I could listen to music all day.could listen to music all day.B B：Yes,but thats not going to help Yes,but thats not going to help you leave the island.I think it would you leave the island.I think it would be better to have a boat.Then you be better to have a boat.Then you can leave the island by boat.can leave the island by boat.A A：Maybe you are right.Maybe you are right.GroupworkGroupwork(4:P70)(4:P70)Then give a report like this:Then give a report like this:In our groupwould like to have a radio because he could listen to music.But thinks it would be better to have lots of food.Then he can have somethings to eat before people come to save him.汉译英。汉译英。（1）计算机是何时发明的？计算机是何时发明的？（2）谁发明了电灯？）谁发明了电灯？（3）计算器是用来做什么？）计算器是用来做什么？（4）你认为什么是最有用的发明？）你认为什么是最有用的发明？（5）每天它能够给人们更多时间工作和玩。）每天它能够给人们更多时间工作和玩。1.When was the computer invented?2.Who was the light bulb invented by?3.Whats the calculator used for?4.What do you think is the most helpful invention?5.It gives people more time to work and play every day.1.Give a report about 3b.2.If you are an inwentor,what would you like to invent?