Question

Let it be written by him. Voice change

Answer 1

it should be written by him

Answer 2

It should be written by him.

Or you can say, Let him write it.

When the subject is acted upon the verb, it called passive voice.

On the other part, if the subject performs the functions stated by the verbs then it is called as active voice.

But sometime, subjects can perform according to the objects and it is very difficult to identify the voice of such sentences.