"I know that he did the work" বাক্যটির সঠিক পরিবর্তিত voice হবে-
ক
It was known to me that the work had been done by him
খ
It was known to me that the work has been done by him
গ
It is known to me that the work was done by him
ঘ
It was known to me that the work was done by him
সঠিক উত্তর: It is known to me that the work was done by him
"I know that he did the work" বাক্যটির সঠিক পরিবর্তিত voice হবে - - - It is known to me that the work was done by him.