八种时态的被动语态：(变 be 的时态即可，done不动)
1)一般现在时：am / is / are + done
①People grow rice in the south of the country.
Rice is grown in the south of the country.
②The school doesn't allow us to enter the chemistry lab without a teacher.
We are not allowed to enter the chemistry lab without a teacher.
2)一般过去时：was / were + done
①They agreed on the building of a new car factory last month.
The building of a new car factory was agreed on last month.
②The students didn't forget his lessons easily.
His lessons were not easily forgotten
3)一般将来时：will + be done
①They will send cars abroad by sea.
Cars will be sent abroad by sea.
②They will give plenty of jobs to school-leavers.
Plenty of jobs will be given to school-leavers.
4)一般过去将来时：would + be done
①The manager said they would complete the project by the end of the year.
The manager said the project would be completed by the end of the year.
② The workers told me they would mend the car as soon as possible.
The workers told me that the car would be mended as soon as possible.
5)现在进行时：am / is / are + being + done
①The radio is broadcasting English lessons.
English lessons are being broadcasted on the radio.
② We are painting the rooms.
The rooms are being painted.
6)过去进行时：was / were + being + done
①The workers were mending the road.
The road was being mended.
②This time last year we were planting trees here.
Trees were being planted here this time last year.
7)现在完成时：have / has + been + done
①Someone has told me the sports meeting might be put off.
I have been told the sports meeting might be put off.
②He has brought his book here.
His book has been brought here.
8)过去完成时：had + been + done
①When I got to the theatre, I found they had already sold out the tickets.
When I got to the theatre, I found the tickets had already been sold out.
② The whole country was very sad at the news of his death; people had considered him to be a great leader.
The whole country was very sad at the news of his death; he had been considered to be a great leader