Question

I know her-change into passive voice

Answer 1

The given sentence "I know her" is in the active form.

The passive form of this given sentence is supposed to be

 "She is known by me".

Here the subject and predicate parts are altered and rearranged to change the given sentence from active to passive form by keeping the grammar correct.

Answer 2

Answer:

She is known by me

Explanation:

As the given sentence is a Simple Present tense sentence. Rule say (Object + am/is/are+V3+by+Subject) so, here the Obeject is "her" which chnages as She in subject and acc to the sub pick am/is/are so She is, V3 of know is known by, I in objective become me.