一般现在时:主:We believe him.被:He is believed by us.
一般过去时:主:He bought his children some pens.被:Some pens were bought for his children by him.
一般将来时:主:Everyone will know the truth soon .被:The truth will be known by everyone.
现在进行时:主:Mary is making a doll.被:A doll is being made by Mary.
过去进行时:主:They were carrying the hurt player.被:The hurt player was being carried by them .
现在完成时:主:He has received the letter.被:The letter has been received by him.
过去完成时:主:They had built ten bridges.被:Ten bridges had been built by them.