He has written a poem which fascinates every one.

A poem has been written by him which fascinates every one

Every one is fascinated by the poem which has been written by him

Poem written by him fascinates every one

Every one fascinates the poem which is written by him

All of the above

Past Indefinite tense

Active Voice= Subject + Second Form of Verb + Object.

Passive Voice = Object + was/were + third of verb + by + subject.

Active voice: He has written a poem which fascinated everyone.

Passive voice: Every one is fascinated by the poem which has been written by him