Question

i don't know his address (change the voice)

Answer 1

The answer is, “His address is not known to me”

While changing from Active to passive or vice versa, you need to keep three things in mind – a verb, a subject and object.

It will help you to determine the sentence flow as per the agent, the task done and on the object.

You need to convert it in such a way that subject works on an object or vice versa.

Answer 2

Answer:

His address is not known to me.