The singular possessive is cabinet's (referring to one cabinet).
cabinets' if plural or cabinet's if singular.
The possessive form is Amos's.
The singular possessive form is herd's.
The singular possessive form is heart's; the plural possessive form is hearts'.
The singular possessive form is lesson's.
cabinets' if plural or cabinet's if singular.
The singular form of the plural noun 'geese' is goose.The singular possessive form is goose's.
The possessive of the singular noun alto is alto's.
The singular form would be instructors and the possessive form is instructor's.
The possessive form is Amos's.
The singular form is goose; the singular possessive form is goose's.The plural form is geese; the plural possessive form is geese's.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form is week's.
The singular possessive form is frontiersman's.
The singular possessive form is aircraft's.
The singular possessive form is contralto's.
The singular possessive form is speculum's.