A mark of possession,
(not mine, yours or theirs
but Jennifer’s or James’),
or a tag of omission,
(can’t, mustn’t, won’t).
Not to be confused with plurals.
Look at all the Marys out there!
(volume)
What exactly is Mary’s?
(belonging to)
Who knows what Mary’s gonna do?
Deletion of the is, specifically the I,
like an omission or loss of will,
a form of “What’ll I Do”
when you are no longer here.