Raju had sung a song.(change into passive voice)
AA song had sung by Raju.
BA song has been sung by Raju.
CA song had be sung by Raju.
DA song had been sung by Raju.
AA song had sung by Raju.
BA song has been sung by Raju.
CA song had be sung by Raju.
DA song had been sung by Raju.