Change Voice: Daniel is singing a song.

A song is being sung by Danial.

A song had being sung by Danial.

A song was being sung by Danial.

None of these

Convert the object of the Active Voice Sentence into the subject of the Passive Voice Sentence.

Use the additional helping verb “being” with “is/are/am”, to show the continuous tense.

Use 3rd form of the verb.

Use the word “by”, to show the doer.