人教版（2019）英语必修第二册《The internet》SectionⅢ PPT
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《The internet》SectionⅢ PPT
专项突破
现在完成时的被动语态
1．(教材P28)Much________________________ (write) about the wonders of the World Wide Web．
2．(教材P28)But the Internet _________________ (do) much more for people than simply make life more convenient．
3．(教材P28)Many people _______________________ (help) by the club．
4．(教材P28)She no longer feels lonely, and her company __________________ (become) quite successful．
5．(教材P32)Today I thought I’d blog about a question that _________________ (ask) many times—how do you stay safe online and avoid bad experiences on the Internet?
一、现在完成时的被动语态的结构
肯定式 主语＋have/has been done．．．
否定式 主语＋have/has not been done．．．
一般疑问式 Have/Has＋主语＋been done．．．？
特殊疑问式 疑问词＋have/has＋主语＋been done．．．？
◆He has been selected to take part in the sports meeting．
他已被挑选出来参加运动会。
◆The ink has not been removed from his overcoat．
墨迹还没有从他外套上去掉。
◆Has the date for the next meeting been decided?
下次会议的日期已确定了吗？
◆How long has the battery not been changed?
电池多久没有更换了？
二、现在完成时的被动语态的用法
1．现在完成时的被动语态同它的主动语态一样，强调过去的动作对现在造成的影响或结果，通常与already, yet, just, never, recently等副词连用。
◆The machine has already been repaired．
机器已经修好了。
2．表示一个被动的动作或状态开始于过去，持续到现在，并可能持续下去，常与for或since引导的时间状语连用，或用于“How long ．．．？”句型中。
◆Financial problems of the company have been discussed for nearly two hours．
公司的财务问题已被讨论了近两个小时了。
◆How long has this film been shown?
这部电影已放映多长时间了？
3．用在时间或条件状语从句中，表示将来某时已完成的动作，即用现在完成时的被动语态代替将来完成时的被动语态。
◆You shouldn’t leave school before your homework has been finished．
在你的作业没完成之前你不应该离开学校。
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