The singular form of the plural noun players is player.
The singular possessive form is player's.
Example: The player's uniform was covered in mud.
The possessive form of the plural noun players is players'.
example: The players' uniforms arrived minutes before the start of the game.
The singular form of the plural noun players is player.The singular possessive for is player's.example: The player's shoestring came loose and caused him to trip.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The plural form for the noun play is plays; for example: We attended two plays this weekend. Some good plays put us in the lead. The word play is also a verb; verbs do not have singular and plural forms.
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.
The singular possessive is biker's; the plural possessive is bikers'.