Question

he has finished his homework change it into voice change

Answer 1

Your answer is....
He had been finished his homework...

Answer 2

$Hey...$

Here is your answer...

Main sentence :

He has finished his homework.

New sentence :

The homework has been finished by him.

Explanation :

While changing the voice we focus on changing the tense.

For example : Has is changed to has been.

$Hope \: it \: helps.$