Question

He will write a letter

change in Passive voice ​

Answer 1

A LETTER WILL BE WRITTEN BY HIM

HOPE THE CONCEPT IS CLEAR TO U

Answer 2

$\huge\mathfrak{Hello \ Good \ morning}$

A letter will be written by him.

Extra notes

The word that Express what is done to the subject is said to be in Passive voice.

The word that expresses the action done by the subject is said to be in the active voice.