Question

voice
I know him well​

Answer 1

Answer:

This sentence cannot be changed into passive voice. The verb (know) is a stative verb here. ... So, this sentence cannot be changed into passive voice. If you think "He is known to me." is inpassive form, then you need to knowthat "known" is an adjective here

Explanation:

I know him very well if this is your question then this is change into voice but I know him well is not

I hope you understand

Answer 2

Answer:

He is well known by me.

Hope it helps you.