If subject were object(yadi subject object hota)
If subject had object(yadi subject ke paas object hota)

IF I WERE (यदि मे होता) (पूरी होने वाली कामना)

STRUCTURE

IF + SUBJECT + WERE + OBJECT-SUBJECT +WOULD HAVE +V3 + OBJECT

Example:

If I were a singer than I would have sung a song.
yadi me gayak hoti to ek gana gati.