One way to rewrite this sentence using passive voice is:
A) Sometime somebody loves everybody.
B) Somebody loves everybody at sometime.
C) Somebody is loved by everybody sometime.
D) Everybody feels love for somebody sometimes.
"Somebody" is still the object but now since it is in the passive voice, "somebody" receives the love but in the orginal "everybody" is just giving the love.
Somebody is loved by everybody sometime. The object is still 'somebody', but now it passively receives love, while in the original the love is actively given by 'everbody'.
