《The Internet》SectionⅣ PPT课件
现在完成时的被动语态
语法整体突破
现在完成时是一种现在的时态。它可表现为现在完成时的主动语态和现在完成时的被动语态两种形式。
一、概念
[合作探究]
There are countless articles telling us how the Internet has made our lives more convenient.有无数的文章告诉我们互联网如何使我们的生活更方便了。
Much has been written about the wonders of the World Wide Web.
关于万维网的奇迹已经写了很多。
[自主发现1]现在完成时态表示________发生的动作或存在的状态到现在已经完成或者仍将持续下去。它强调对________造成的结果或影响。它有主动语态和被动语态两种形式。
二、构成
[合作探究]
I have heard nothing from him up to now.到目前为止我没有他的任何消息。
I haven’t seen him recently.我已经很久没有看到他了。
The experiment has been done successfully.这个实验做得很成功。
The blackboard has not been cleaned yet.还没有擦黑板。
[自主发现2]
(1)现在完成时的主动语态：________________ (肯定式); has/have not done(否定式)
(2)现在完成时的被动语态：__________________ (肯定式); ____________________(否定式)
三、基本用法
1.完成用法
[合作探究]
He has turned off the light.他已把灯关了。
He has already obtained a scholarship.他已经获得了一份奖学金。
This book has been translated into many languages.这本书已被译成多国语言。
These flowers have been watered，so you can go home.
这些花已经浇水了，所以你可以回家了。
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