church's
The possessive form of the singular noun church is church's.example: We took up a collection to repair the church's roof.
The form churches is the plural of the noun "church."example: There are three churches on this street.The form church's is the singular possessive noun.example: There was a special request for donations to repair the church's roof.
"Firefly's" is a singular possessive noun.
The singular possessive noun is stepchild's.
No, "tomb" is a singular common noun, not a possessive noun.
The singular noun is tooth.The singular possessive noun is tooth's.
The singular possessive form for the noun clock is clock's.
The noun vest is the singular form.The noun vest's is the singular possessive form.
No, "she's" stands for she is. The singular possessive noun for a female is her or hers.
The singular possessive noun of grandmother is grandmother's.
The singular possessive noun for nature is "nature's."
The singular possessive noun for lioness is lioness' or lioness's, whichever you think sounds better.