Надо переделать предложения по англискому в пассивный залог

1 The door has been opened by Tom.
2 The door had been opened by Tom.
3 The book has been returned to the library by Kathy.
4 The book had been returned to the library by Kathy.
5 Those papers have not been signed by Mrs.Andrews yet.
6 Have they been signed by Mrs.Andrews yet?
7 The walls have been painted dark grey by Jack.
8 A lot of money had been made by Charley.