The boys were playing Cricket.

Cricket had been played by the boys.

Cricket has been played by the boys.

Cricket was played by the boys.

Cricket was being played by the boys.

Cricket was being played by the boys.

The given sentence is in Past Continuous Tense and it is in active voice. We need to change it into Passive voice.

Rule :

Subject + (was /were) + being + V3 + Optional Agents.