'I have bought the books' বাক্যটির সঠিক পরিবর্তিত Voice হবে-
The books have been bought by me.
The books had been bought by me.
The books were bought by me.
The books are bought by me.
‘Let him sing a song’ বাক্যটির সঠিক পরিবর্তিত Voice হবে-
Let a song be sang by him.
Let a song sing by him.
Let a song sang by him.
Let a song be sung by him.