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(1a2c)学案（无答案） 人教新目标版.doc

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(1a-2c)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1a -2c 的单词和短语 invent, calculator, scoop, adjustable, heel, battery, operate, battery operated , slipper heat, calculator, scoop2）重点短语： be used for, in the dark3）重点句型（talk about inventions）： when was (the telephone .) invented? i think it was invented in . i think (the telephone .) was invented before / after .who was it / were they invented by? it was / they were invented by . what is it / are they used for?it is / they are used for . 4）重点语法： (1)一般过去时的被动语态结构和用法。2)一些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.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：1)通过本单元学习使学生懂得人类的科学发明创造了丰富的物质文明。2)培养学生的创造发明的能力和愿望。导学过程一、自主预习1、match the new words with their chinese meaning invent calculator scoop adjustable heel operate slipper heat battery light bulb microwave oven用勺舀, 可调整的 后跟 拖鞋 电池供电的 使变热 发明创造 操作作业 微波炉 计算器 电池2、搜集过去时的被动语态的的用法，其结构为： was /were +p.p你能从课本中找出例句吗？3、查找资料预习be used for的用法以及invent 的名词形式二、学案导学step 1. 情境导入：warm-up have a contest:teacher tells a story of a person and asks students to guess who he/she is. he was from america. he was one of the greatest inventors in the world. he was clever but he was in school for only 3 months. his mother taught him to read and write. he build his own chemical lab when he was a boy. his first invention was the automatic telegraph repeater(电报自动转发器) . he has many inventions in his life and some inventions have changed the world.step 2. 1a. 1a doing group work:ask students number the inventions according the order they were invented.step 3. grammar: the passive voice.(1)the uses of the passive voice.(2)the structure of the passive voice.(3)how to change into the passive voice.for example: edison invented the light bulb the light bulb was invented by edison karl ben invented the car_ was invented by _bill invented the telephone_ was invented by_step 4. 1b. 1b listening and matching the inventions with the dates.step 5. 1c. doing pairwork: talk about the inventions in 1b like this:a: when was the telephone invented?b: i think it was invented in 1876.a: when was the car invented?b: i think it was invented in 1885.a: when was the tv invented?b: i think it was invented around 1927.a: when was the hand-held calculator invented?b: i think it was invented in 1971.step 6. 2a. listen and number the inventions in the order. languages points: “be used for” eg: telephone is used for talking with people.step 7. 2b. listen and match the inventions with their inventor and uses.step 8. 2c. pairwork: role play conversations using the information in 2b.step 9. look through the grammar focus.三、 拓展延伸the passive voice被动语态英语中动词有主动语态和被动语态两种语态. 主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者, 在被动语态中动作的执行者有时用by短语表示来.被动语态的构成:助动词be+ (及物动词的)过去分词am (is, are) + done一般现在时was (were) + done一般过去时被动语态的用法:1. 不知动作执行者时,常用被动语态.eg. my bike was stolen yesterday. this car is made in american.2. 不必要说出动作执行者时,常用.eg. rome was not built in a day.3. 为了突出强调动作的承受者时,常用被动语态.eg. thousands of beaches are polluted (污染)主动语态变为被动语态的步骤1.把原主动句中的宾语转换为被动语态的主语.2.把动词改为被动形式,即 “be + 过去分词”注意be动词要按新的主语的人称和数进行变化,时态要和原来的主动语态的时态保持致.3. 原来主动语态句中的主语,如果需要,就放在by后面以它的宾形式出现. 如果没有必要就可以省略.其他的成分 (定语,状语) 不变, 句式也不能变.被动语态变被动语态的结构图:bell invented the telephone in 1876. the telephone was invented by bell in 1876.四、课堂测评(一)用适当形式填空1he told us that the jet plane_ _(invent) in19302 when _ the great wall _ (build)?3 batteries are used for_(see) in the dark4 who_ they _ (invent) by?(二)按要求改写下列句子1 the helicopter was invented in1990 （对划线部分提问） _ _the helicopter _?2. someone turned down the television just now （改为被动语态） the television _ _ down just now3 english is spoken as a second language in many countries（被动语态）people _ _ as a second language in many countries4 the glass is used for keeping water hot（改主动语态）they _ the glass_ keeping water hot5 i think the most helpful invention is the light bulb（对划线部分提问） _ _you think _the most helpful invention?(三) 补全对话a hi, anna what are you doing?b i am writing an e-mail to victor on the computer.a great! it is very interesting.b yes i think the computer is _ _ helpful invention it can help people do many thingsa can it_ _ _ playing gamesb yes you can use the computer for playing many kinds of games a good it is useful i will buy one and learn how to use it五、homework: finish the task: ask the students to read about an invention using an encyclopaedia(辞典) or other book from the library,