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.