Question

Change to passive voice-
May I see this map?

Answer 1

May have I seen this map?

This is the proper passive voice and make sure this should be followed in a proper way.

There are two types of voices like active voice and passive voice.

From active voice you have to do the passive voice which has come in every grammar questions in every class.

Answer 2

Answer:

Hi dear, the answer is "May this map be seen by me?"

Explanation:

Cuz this is the way the Passive voice must be made.
Thanks,