Oases (OH-AY-SEES).
The singular possessive form of "oasis" is "oasis's."
oasisis
The plural of "oasis" is "oases."
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular form is oasis, the plural form is oases.
The singular form of the plural noun 'oases' is oasis.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive pronouns are mine, yours, his, hers, and its. The singular possessive adjectives are my, your, his, her, and its.
The singular possessive of dish is dish's
The singular possessive is Martin's.
The singular possessive is fish's.
Grave's is the singular possessive.
The singular possessive is test's.
Buzz's is the singular possessive.