人教版高中英语课件：必修2 第3单元 Computersgrammar

1、grammar translate the following expressions 1.be employed 2.be increased 3.be volunteered 4.be said to have disappeared 5.be said to be happy 6.be said to have resigned 被就业被就业 被增长被增长 被自愿被自愿 被失踪被失踪 被幸福被幸福 被辞职被辞职 the times of passiveness被时代被时代 （被动语态（被动语态be+done） 把下列含有被动语态的英语谚语翻译成中文把下列含有被动语态的英语谚语翻译成中文

2、he is not laughed at that laughs at himself first 自嘲者不会让人见笑。 time lost cannot be won again. 时光流逝，不可复得。 once bitten , twice shy （一朝被蛇咬，十年怕井绳） experience must be bought. 吃一堑，长一智。 rome is not built in a day. 冰冻三尺，非一日之寒。 动作谁做的不知道，说出谁做的不必要；动作谁做的不知道，说出谁做的不必要； 接受动作者要强调，用被动语态最为妙。接受动作者要强调，用被动语态最为妙。 the promi

3、se has been carried out. a new library is being built near our house. is chinese spoken by many people outside china? the cook is liked by us all. 口诀一口诀一 何时使用被动语态？何时使用被动语态？ 如何将主动语态变为被动语态？如何将主动语态变为被动语态？ 口诀二口诀二 宾变主，把宾变主，把“是（是（be）”补；补； 动词跟，变过（去）分（词）；动词跟，变过（去）分（词）； 时与数，时与数，“是是”随主（语）；随主（语）； 时态随原句，莫变要记准时态

4、随原句，莫变要记准 主语代词变宾格，成为主语代词变宾格，成为by宾宾( 语语)。 e.g. the workers will complete the stadium next year. the stadium will be completed next year (by the workers). the writer writes such books for children. such books are written for children (by the writer). we love the party. the party is loved by us. 使用被动语态

5、应注意使用被动语态应注意 口诀三口诀三 被动不离被动不离“be”与与“p.p.”，主谓一致莫忘记，主谓一致莫忘记， 句中时态要留意，句中时态要留意，“进行进行”易漏一个易漏一个 “being”. 1. -have you moved into the new house? -not yet. the rooms _. a. are being painted b. are painting c. are painted d. are having painted 2. they were cleaning their classrooms. their classrooms were bein

6、g cleaned by them. 表格：被动态基本结构 时态时态被动语态结构被动语态结构 一般现在时一般现在时 一般过去时一般过去时 现在进行时现在进行时 过去进行时过去进行时 过去完成时过去完成时 过去将来时过去将来时 一般将来时一般将来时 现在完成时现在完成时 am/is/are done was/were done am/is/are being done was/were being done will be done would be done have/has been done had been done 歌诀是：被动语态歌诀是：被动语态be字变，过去分词跟后面。字变，过去分

7、词跟后面。 1.as the year have gone by, i1.as the year have gone by, i have been madehave been made smaller and smaller.smaller and smaller. 2. a wrist-worn pc2. a wrist-worn pc has been inventedhas been invented recently.recently. 3. many new buildings3. many new buildings have been builthave been built

8、in tiantaiin tiantai since 1990.since 1990. 4. a new library4. a new library has already been builthas already been built in tiantaiin tiantai high school.high school. 5.the houses5.the houses have been destroyedhave been destroyed by the storm.by the storm. 6.several soldiers6.several soldiers have

9、have alreadyalready been killedbeen killed in the in the conflict.conflict. do the underlined parts have something in common? discovering: 现在完成时的被动语态现在完成时的被动语态 have/has been done 1构成：构成： 主动语态主动语态 被动语态被动语态 现在完成时现在完成时 have/has done the present perfect passive voice （现在完成时的被动语态）现在完成时的被动语态） 现在完成时的被动语态表示

10、动作发生在过去现在完成时的被动语态表示动作发生在过去, 到现在已经完成或对现在仍有影响到现在已经完成或对现在仍有影响 have/has been done learning the structure: find out the sentences using the present perfect passive voice from the text 请找出课文中含有现在完成时被动语态的句子 over time i have been changed quite a lot. i have been used in offices and homes since the 1970s. an

11、d my memory became so that, like an elephant, i never forget anything i have been told. since the 1970s many new applications have been found for me. i have also been put into robots and used to make mobile phones as well as help with medical operations. i have even been put into space rockets and s

12、ent to explore the moon and mars. a wrist-worn pc _a wrist-worn pc _ (invent) recently.(invent) recently. a pen-like computer a pen-like computer _already_already_ (develop)(develop) has been invented hasbeen developed. 小试牛刀小试牛刀 the new campus of hua longgen high the new campus of hua longgen high s

13、chool_already_(buildschool_already_(build). ). has been built thehouses_(destthehouses_(dest roy)byroy)by the storm. the storm. have been destroyed group work 2 . change the following sentences into the present perfect passive voice. put the verbs into correct form. recently (we) have bought a new p

14、ersonal computer. recently a new personal computer have been bought. 主动句中的主语主动句中的主语we变为被动语态时被原句中的宾语替换变为被动语态时被原句中的宾语替换 2 . change the following sentences into the present perfect passive voice. put the verbs into correct form. recently we have bought a new personal computer. we have used the computer

15、 every day since we bought it. we have just joined our computer to the internet. however, we have found many problems with it. so we have decided to ask a professional man to fix it. soon he has fixed the computer. he has built a pc the way we wanted . how excited we are! these days we have written

16、a lot of e-mails on the computer. we have decided to write a report about the positive and the negative effects of using computers. 2 . change the following sentences into the present perfect passive voice. put the verbs into correct form. recently a new personal computer have been bought. the compu

17、ter have been used every day since we bought it . our computer have been just joined to the internet. however, many problems have been found with it. so it has been decided to ask a professional man to fix it. soon the computer has been fixed. a pc has been built the way we wanted . how excited we a

18、re! these days a lot of e-mails have been written on the computer. it has been decided to write a report about the positive and the negative effects of using computers. what has been decidedwhat has been decided example: s1: it has been decided that those who s1: it has been decided that those who d

19、o not do heir homework will be asked to return do not do heir homework will be asked to return to school on saturday. to school on saturday. s2:it has been decided that those who keep the s2:it has been decided that those who keep the classroom tidy should be allowed to go home classroom tidy should

20、 be allowed to go home early everyday.early everyday. s3:it has been decided thats3:it has been decided that s4: s4: get into groups of four. your task is to decide what has been decided for the class .take turns to make the ideas as interesting or as lively as you can. collect the ones you all like best and be prepared to tell them to the class. play a game: 1. -how long _ at this job? - since 1990. a. were you employed b. have you been employed c. had you been employed d. will you be employed 2.when and where to g