人教版高中英语必修二 《The internet》SectionⅢ PPT

《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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