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人教2003课标版《Learning about Language》优质课教案下载
Look at the following sentences, paying attention to the underlined part.
Over time I have been changed quite a lot.
First as a PC (personal computer) and then as a laptop, I have been used in offices and homes since the 1970s.
Over time my memory has developed so much that, like an elephant, I never forget anything I have been told!
Since the 1970s many new applications have been found for me.
5) I have also been put into robots and used to make mobile phones as well as help with medical operations.
6) I have even been put into space rockets and sent to explore the Moon and Mars.
Step2 Demonstration
现在完成时的被动语态
Defination:
现在完成时的被动语态表示某个被动的动作发生在过去,对现在 造成了结果和影响；或者某个被动动作从过去开始，一直持续到现在，对现在造成了结果和影响 。
The new school has been set up. 新学校已经建成了。
The machine has been used for years. 这台机器已经被使用了数年了。
现在完成时被动语态的肯定式为：have / has + been + done
The experiment has been done successfully. 这个实验做得很成功。
现在完成时被动语态的否定式为：have / has + not + been + done
Tom’s novel has not been published. 汤姆的小说还没有被出版。
现在完成时被动语态的一般疑问句需将have / has提到主语的前面。
Has his bike been repaired? 他的自行车修好了吗？
现在完成时被动语态的特殊疑问句为：疑问词 + have / has + been + done
Who has been invited? 谁受到了邀请？
现在完成时的被动语态通常有以下两种情况：
1.过去开始的被动动作一直持续到现在，常与之连用的时间状语有：for+一段时间，since+时间状语（从句），these days, so far, up to now, in the last / past few years等。
e.g. This class have been taught by Mr. Brown for two years.
His Chinese has been improved a lot since he came to China.