Question

i don' t know voice change​

Answer 1

Answer: It is not know to me.

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Answer 2

$\huge\mathfrak\pink{answer:}$

It is not know to me.

Explanation:

Subject replaced the place of the object . The object in this sentence is hidden and the object is 'it',as the same sentence can be written as "I don't know it." So It will come in the beginning. Don't is used for V1 and know is V1. Don't is also used here to express the statement as negative. So ,it will be replaced by 'Not'. Only V3 is used in passive sentences ,hence instead of know ,known will come.