UNIT 3 THE INTERNET To learn the present perfect passive voice To use the present perfect passive voice to do some exercises To read a poem and learn to write your own poem 现在完成时 have/has done + v-ed 表示说话时已经完成的动作，而且这个动作的结果对现在仍有影响; 表示动作发生在过去，但一直持续到现在，并且有可能继续持续下去。 Do you know the structures and meanings of the present perfect tense and passive voice? 被动语态 助动词be +vt.-ed be随主语的人称、数和时态的变化而变化。 当强调动作承受者，不必说出执行者或含糊不清的执行者时，多用被动语态。 Read the pairs of sentences. Underline and compare the different verb forms. Jan’s life has been greatly improved by the Internet. The Internet has greatly improved Jan’s life. Much has been written about the wonders of the World Wide Web. People have written much about the wonders of the World Wide Web. Look at the sentences, pay attention to the red part. Over time I have been changed a lot. The results of their experiments have already been published. The party has been planned since the new year. The Present Perfect Passive Voice Verb form Active Passive have / has + been + v-ed How do we form the present perfect passive voice? Fill in the blank. have /has + v-ed 1. The problem has been discussed for 2 days. 2. Many new buildings have been built in the past few years. 3. Two novels have been written by him so far.? 4. The computer has been used every day since I bought it. 5. The dirty clothes have already been cleaned. 6. Great changes have taken place in my hometown in the past 10 years. Find the present perfect passive structures. 现在完成时的被动语态意义及结构 表示动作发生在过去, 到现在已经完成或对现在产生的影响。动词和被修饰主语构成被动关系。 肯定式：have/has + been + v-ed 否定式：have/has + not + been + v-ed 一般疑问句： Have/Has +主语+ been +v-ed? 特殊疑问句： 疑问词+have/has +been+ v-ed? 现在完成时的被动语态有两种情况： 1) 表过去开始的被动动作一直持续到现在，常连用的时间状语有：for+段时间，since +时间状语(从句)，these days, so far, up to now, in the last/ past few years等。 如： This class have been taught by Mr. Brown for two years. His Chinese has been improved a lot since he came to China. Rowling’s novels have been translated into many foreign languages so far. 2) 表某被动动作对现在造成的影响或结果，常与already, yet, just, ever, never, recently等连用。如： The bike has not been repaired yet. I have already been introduced to Mr. Smith. 注意：有些动词没有被动语态, 如不及物动词happen, take place, break out等。 1. Paper money _____ (use) for over a thousand years. 2. — _____ the letter _____ (give) to Mr. Black? — No. It’s still on the desk. 3. Great changes _____ (take) place in my hometown and a lot of factories _____ (set) up. has been used Has been given have taken have been set Complete the sentences. 4. —How long _____ (employ) at this job? —Since 1999. 5. When and where to go for the on-salary holiday _____ (not, decide) yet. 6. I like these English songs and they _____ (teach) m ... ...
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