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课件网) Discovering Useful Structures Unit 3 The Internet Learning objectives In this class, you will ● identify and summarize the form and the functions of the present perfect passive voice; ● compare the present perfect passive voice with the active and change the active form into the passive form; ● apply the present perfect passive voice to interpret the newspaper headlines and create a poem. 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. passive voice The Present Perfect Passive Voice 定义： ①表示动作已经完成，强调对现在造成的影响和结果。 常与一些副词连用，如already, ever,never, recently,lastly, just,yet等，通常把副词放在助动词have或has的后面，有时候也可以放在句末。 Summary ②表示一直持续到现在的动作或状态。 经常与for a time,since,how long,so far等表示一段时间的时间状语连用。 The child has been taken care of by gandma all these years. 这些年来，孩子一直由奶奶照看。 构成： 陈述句 主语+has/ have（not） been+P.P.+... 例1：Her motorbike has been stolen. 她的摩托车被盗了。 一般疑问句 Has/have+主语+been+P.P.+... 特殊疑问句 特殊疑问词+have/has +been +P.P.+... 例2：Have they been sent abroad to study Eng-lish 他们已经被派往国外学英语了吗 例3：Who has been invited 谁受到了邀请？ Tip① 由finish, buy, start, begin, post, return, borrow, marry, open等词构成的现在完成时的被动语态,不能与表示段时间的状语，如for four days, how long等连用，而要改换动词或者是时态。 判断正误: * How long has this book been bought （ ） * How long ago was this book bought （ ） V X Tip② 短语动词不能分割，而且不能省略短语动词中的介词或副词。 判断正误: *The patient has been taken good care. （ ） *The patient has been taken good care of. （ ） V X Tip③ 并不是所有的动词都有被动语态。如happen, occur, take place, break out, belong to, cost, last等不及物动词或词组，就没有被动语态。 判断正误: *Some of the best conversations have ever happened around the dinner table. （ ） *Some of the best conversations have been happened around the dinner table. （ ） V X Tip④ 双宾语动词变被动语态可将其中的一个宾语变为主语, 另一个保留不动。 主动: I have given him the key. 被动: He has been given the key. 被动: The key has been given to him. Tip⑤ 带复合宾语的动词变被动语态时, 只能将宾语变为主语, 原来的宾补保留不动, 改成主语补足语。 主动: I have asked her to help you. 被动: She has been asked to help you. 主动语态中作宾语补足语的 不带to的不定式，变为被动 时，要加上to。 例：The engineer made the robot clean the windows of the tall building. The robot was made to clean the windows of the tall building. Change the sentences into the present perfect passive voice. 1 I have downloaded the software to help my phone battery last longer. 2 Someone has lost an identity card. 3 Have you confirm ... ...
