1、被动语态的结构：
主语+be动词的不同时态+过去分词（by）+（其它）
现在完成时的被动语态：
主语+have/has+been+过去分词+（by）+（其它）
2、Revise the passive voice and look at the tense used here.
EXAMPLE：As the years have gone by, I have been made smaller and smaller.
Can you pick out the other two sentences in the present perfect passive voice
from the reading passage?
1 … My family and I have been used by billions of people to deal with
information …
2 I have truly been built to serve the human race …
3、Change the following sentences into the present perfect passive voice. Put the
verbs into the correct form.
EXAMPLES：We have made a plan. → A plan has been made by us.
He has fixed the computer. → The computer has been fixed by him.
1 We have bought a new personal computer.
A new personal computer has been bought by us.
2 We have found many problems with our new computer.
Many problems have been found with our new computer.
3 They have built a PC the way we wanted.
A PC has been built the way we wanted.
4 They have just joined our computer to the Internet.
Our computer has just been joined to the Internet.
5 We have used the computer every day since we bought it.
The computer has been used every day by us since we bought it.
6 We have written a lot of e-mails on the computer in the past year.
A lot of e-mails have been written on the computer in the past year.