【金识源】九年级英语全册 Unit 6 When was it invented？（第1课时）课件.ppt

Unit 6 When was it invented？,Period One（Section A 1a-2c),情境引入,four great inventions:,compass,paper making,gun powder,printing,情境引入,When was the _ invented?It was invented in _.,1876,1885,1971,1927,1976,情境引入,light bulb1879,Edison,1.When _ the light bulb _?It was invented in _.2.Who _ it _ by?It _ _ by Edison.3.What is it _ for?It is used for _ people _ in the dark.,情境引入,The keys:,was;invented;1879.was;invented;was;invented.used;helping;see.,情境引入,car 1885,Benz.,Practice:When was the car invented?It was invented in 1885.Who was it invented by?It was invented by Benz.Whats it used for?Its used for traveling.,A:What is the computer used for?B:It is used for studying,What is the calculator used for?It is used for calculating.,情境引入,Bell 1876,Beld 1927,Kelif 1976,Fen.Noyma 1971,情境引入,Answer the questions below:When was it invented?Who was it invented by?Whats it used for?,Practice,Listen and match the inventions with the dates.,_1885 _1927 _1971 _1976 _,inventions,high heels,adjustable 可调整的,adjustable heels,ice cream scoop,scoop,heated ice cream scoop,inventions,inventions,slippers,a battery,batteries,battery-operated slippers,Listening,1.Listen to the tape and finish the task 2a and 2b of page 42.2.Make conversations using the informations in 2b.,情境引入,The Passive Voice:被动语态,被动语态的用法:不知道动作的执行者时，常用被动语态。eg:1）My bike was stolen yesterday.2)This car is made in America.2.不必要说出动作的执行者时，常用被动语态。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.,情境引入,The Passive Voice:被动语态,主动语态变被动语态的步骤：,1.把主动语态句中的动作的承受着变成被动语态句中的主语。2.把动词改为被动形式，即“be+动词的过去分词”。注意be动词要按新的主语的人称和数的变化而改变。时态要和原来的主动语态时态保持一致。3.原主动语态句中的主语，如果需要，就放在by的后面，要变成它相对应的宾格形式，如果不需要，可以省略。其它成分不变。,被动语态的构成：主语+be+动词的.过去分词常见的几种时态的被动语态的句型。一般现在时：主语+be(am/is/are)+动词的 过去分词+-.一般过去时：主语+was/were+动词的过去分词+-.一般将来时：主语+will/shall+be+动词的 过去分词+-.含情态动词时其构成：主语+情态动词+be+动词的.过去分词.,The Passive Voice:被动语态,Exercises,用所给单词的正确形式填空：1)When was the telephone _(invent)?2)The computer can _(help)us do math problems.3)In those day,the woman couldnt _(afford)a TV because they were really expensive.4)A friend of _(I)came to see me last week.5)I think you need to _(take)a history class.,The keys:,1)invented 2)help3)afford4)mine5)take,Homework,1.Write a passage about a new invention and introduce it.2.Do some relevant exercises.,Thank you!,