помогите перевести в perfect passive

1) This letter has been recently brought by the secretary.
2) The milk has been just spilled by Jack.
3) This cup has been broken by my little brother.
4) The room has been dusted carefully.
5) An envelope was bought and the letter was posted by him, when he felt better and he had reached the post-office.
6) The letters had been typed by her, by the time the director came.
7) The work has been finished by them after they went home.
8) They wondered why he hadn't been visited by us before.
9) A good story has been just told me by Tom.
10) The name was told by her, after we had asked her twice.
11) This house has been never lived by us.
12) The report will have been discussed by next week by them.
12) The time-table will have been changed by the secretary.