江西省萍乡市芦溪县宣风镇中学九年级英语全册 Unit 9 When was it invented Section A 3a 3b 4学案（无答案） 人教新目标版

江西省萍乡市芦溪县宣风镇中学九年级英语全册 Unit 9 When was it invented Section A 3a 3b 4学案（无答案） 人教新目标版教师寄语：Its never too late to mend. 亡羊补牢，犹为未晚导学目标:1基础知识目标： 1）准确朗读并识记70页的单词和短语 light bulb microwave oven2）重点短语： be used for, in the dark3）重点句型（Talk about inventions）： What do you think is the most helpful invention?I think the most helpful invention is. It gives people more time to work and play every day.4）重点语法： (1) 一般过去时的被动语态结构和用法。（2）发明的使用以及对它们的描述。5）Target language ： When was the car invented? It was invented in 1885.Who were they invented by? They were invented by .What are they used for? They are used for seeing in the dark.A: What do you think is the most helpful invention?I think the most helpful invention is the light bulb. it gives people more time to work and play every day.2能力目标：使学生学会正确运用被动语态谈论重要的发明的历史和用途3、 学习策略（Learning strategies）: 1） Role playing 2) Discussion4、情感目标：通过熟悉我们周围经常使用发明物的历史来开阔眼界，丰富自己的阅历，使自己养成勤于思考，善于总结的好习惯。导学过程一、自主预习Explain the words meanings in your own words on your note book.1. Invent: There was not such a thing in the world. Someone made it and then there is such a thing. So we can say someone invented it. 2. Discover: There is a thing. But people dont know it or few people know it. Someone find it and make it known to people. We can say someone discovers it. 3. Scoop: When it is a noun, it means a short-handled tool for taking up and moving something. When it is a verb, it means lifting something with a scoop.4. Mistake: If I say 2 and 2 is 1, you can say I make a mistake.5. Annoying: make one angry, unhappy or uncomfortable.6. Adjustable: that can be made more helpful or useful.7. Microwave: very short wave.二、学案导学Step1. Greetings.Step2. Revision:Show some pictures of inventions and talk about them.A: What is it in English? B: ItsA: When was it invented? B: It was inventedA: What is it used for? B: It is used forStep3 . Learn new words:useful, annoyingAsk students to give some examples to show what each word means. For example: A vacuum cleaner is useful. A very loud truck is annoying.Step 3. 3a. Pair workThere are two kinds of inventions. One is helpful invention, and the other is annoying invention. Now in pairs make a list of five helpful inventions and five annoying inventions. Give an example.Helpful inventionsAnnoying inventionsExample: telephoneExample: alarm clock1. plane1. atomic bomb2. computer2. missile3. bike3. rifle4. car4. chemical weapon5. train5. alarm clockStep 4 3b. Discuss the opinions about some inventions with the partner like this: (1)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.Give more samples: (2)A: What do you think is the most annoying invention?B: I think the most helpful invention is the atomic bomb. A: Why is that?B: Well, it gives people more power to kill others.(3)A: What do you think is the less helpful invention?B: I think the less helpful invention is the car. A: Why is that?B: Well, it makes it possible for people to move to distant places faster.Step 5. 4.Group workImagine you are left alone on a small island in the sea. If you are allowed to take five inventions along with you, what would you take?An example:I like to take the followings with me.knifeflashlightcellphonetelescopegunId like to have a because I couldIts used forI think the most helpful invention is But thats not going help you leave the island. I think it would be better to leave三、课堂测评（一）Fill in the blanks with the words given:1.The work _(finish)tomorrow morning.2.The books must_(give)back on time.3.I think the telephone _ (invent) in 1876.4.Tea may _(invent) by accident.5.The ruler _(use )since I began my school life.6.The bikes are used for_(ride)on.（二）1、句型转换。（1）She was seen to come out of the library by him.(变为主动语态)He _ _ _out of the library.（2）When are trees often planted?(变为主动主态)When _ people often _ _?（3）The League founded in Guang zhou in 1992.(就画线部分提问)_ _ the League _?（4）Did the students wear the school clothes a lot?(变为被动语态)_ the sclool clothes _a lot?（5）Kate took good care of the baby yesterday evening.(变为被动语态)The baby _ _well by Kate yesterday evening.（6）His aunt bought him a bicycle.