九上Unit9.ppt

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1、Unit 9 When was it invented?Section AFang YingNo.9 Middle SchoolTeaching aims:1.Useful sentences:When was it invented?Who was it invented by?2.Reading skills3.Grammar focus:the passive voice(被动语态)Four ancient(远古的古的,旧的旧的)inventionscompassgun powderprintingpaperlight bulb(电灯泡灯泡)Thomas Edisoninventions

2、telephonecomputerTVcarcalculator 计算器算器Listen and match the inventions with the dates.1b18761885192719711976dabceA:When was the invented?B:I think it was invented in.A:Who was it invented by?B:I think it was invented by.1cKarl Friedrich Benz,1885Thomas Edison 1879Bell,1876Wok in pairs!Who invented te

3、a?Answer the following questions according to the article above.1.What is the article about?2.When was it invented?3.Who was it invented by?4.How was it invented?The article is about the invention of tea.It was invented over three thousand years ago.It was invented by the Chinese emperor,Shen Nong.I

4、t was invented by accident.Match them into sentences.The teaShen NongSome leavesThe emperorwas boiling drinking water decidedwasnt brought fell to the waterover an open fireto taste the hot mixtureto the western world until 1610.Who can retell the story of the invention of tea?According to an ancien

5、t legend,once when Shen Nong was boiling drinking water over an open fire,some leaves from a nearby bush fell into the water and remained there for some time.He noticed that the leaves in the water produced a pleasant smell.Later he tasted the water and found it quite delicious.Thats how he discover

6、ed tea.The passive voice被动语态被动语态英语中动词有英语中动词有主动语态主动语态和和被动语态被动语态两种语态两种语态.主主动语态表示主语是动作的执行者动语态表示主语是动作的执行者,被动语态表示主被动语态表示主语是动作的承受者语是动作的承受者,在被动语态中动作的执行者在被动语态中动作的执行者有时用有时用by短语表示出来短语表示出来.被动语态的被动语态的构成构成构成构成:助动词be+(及物动词的)过去分词 am (is,are)+donewas(were)+done一般现在时一般现在时 一般过去时一般过去时被动语态的用法被动语态的用法:1.不知动作执行者时不知动作执行者时,

7、常用被动语态常用被动语态.eg.My bike was stolen yesterday.This car is made in American.2.不必要说出动作执行者时不必要说出动作执行者时,常用被动语态常用被动语态.eg.Rome was not built in a day.3.为了突出强调动作的承受者时为了突出强调动作的承受者时,常用被动常用被动语态语态.eg.Thousands of beaches are polluted(污染).主动语态变为被动语态的步骤主动语态变为被动语态的步骤:1.把原主动句中的把原主动句中的宾语宾语转换为被动语态的转换为被动语态的主语主语.2.把动词改

8、为被动形式把动词改为被动形式,即即“be+过去分词过去分词”.注注意意 be动词要按新的主语的人称和数进行变化动词要按新的主语的人称和数进行变化,时态要和原时态要和原来来的主动语态的时态保持一致的主动语态的时态保持一致.3.原来主动语态句中的主语原来主动语态句中的主语,如果需要如果需要,就放在就放在by后后面面以它的宾格形式出现以它的宾格形式出现.如果没有必要就可以省略如果没有必要就可以省略.其他其他的的成分成分(定语定语,状语状语)不变不变,句式也不能变句式也不能变.将下列句子由主动句变为被将下列句子由主动句变为被动句或由被动句变为主动句：动句或由被动句变为主动句：1)Zheng Jie i

9、nvented this special pen.变被动句变被动句This special pen was invented Zheng Jie.2)The bike was fixed up by Jimmy.变主动句变主动句Jimmy fixed up the bike3)People use sunglasses to protect their eyes.Sunglasses are used(by people)to protect eyes.4)Teachers allow students to put up hands in class.Students are allowed

10、(by teachers)to put up hands in class.1.-Excuse me,Im looking for Be the Best of Yourself.-Sorry,.The book you ask for _ out.(2013)A.is selling B.is sold C.was selling D.will be sold2.Have you heard of Earth Day?-Yes,The first Earth Day _ in 1970 to educate us to protect our planet.(2012)A.celebrate

11、 B.celebrated C.is celebrated D.was celebrated3.Soft drinks _ to children for free in some restaurants on Childrens Day.(2011)A.offer B.have offered C.are offered D.will be offered用所给动词的正确形式填空：用所给动词的正确形式填空：1)The bike _(fix)up by Xiao Ming yesterday.2)Sunglasses _(use)for protecting peoples eyes.3)A picture _(put)up on the blackboard.4)French_(speak)in France.5)Teenagers should _(allow)to choose their own clothes.was fixedare usedis putis spokenbe allowed