1.)Have you finished your work?
The given sentence is in present perfect tense.
In a passive voice, It will be- Has your work been finished by you? (has + been + past participle form of the verb)
2.) Will you tell me a story? ?
The given sentence is in simple future form.
In a passive voice, it becomes- Will a story be told by you? (will be+ past participle form of the verb)