谁帮我造5个英语被动句.急.要5个不同句型的。谢谢了。

1.现在进行式被动:The letter is being written by him.
2.现在完成式被动:The letter has been written by him.
3.过去进行式被动:The letter was being written by him when she came.
4.过去完成式被动:The letter had been written by him before she came.
5.未来式被动:The letter will be written by him.