There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: goodness'
Add an apostrophe s ('s) after the existing s at the end of the word: goodness's
Example:
They say that goodness' reward is the goodness itself.
They say that goodness's reward is the goodness itself.
The possessive form of the singular, proper noun Phillip is Phillip's.example: Phillip's bicycle is new.
The possessive form of the singular noun wisdom is wisdom's.Example: His wisdom's flaw is the questionable source of his information.
The singular possessive form for the noun Phillip is Phillip's.The plural form for the noun Phillip is Phillips; the plural possessive form is Phillips'.The singular possessive form for the noun Phillips is Phillips's.The plural form for the noun Phillips is Phillipses; the plural possessive form is Phillipses'.
"He could only thank goodness that his family was safe." "Morality stories often refer to the inherent goodness of man."
Example: "I answered this question out of the goodness of my heart." :)
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
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
Grave's is the singular possessive.
The singular possessive is test's.
The singular possessive is Martin's.
The singular possessive is fish's.
Buzz's is the singular possessive.
The singular possessive is biker's; the plural possessive is bikers'.
The singular possessive of criteria is criteria's.
There's no such thing as a singular possessive verb. Chris's is a singular possessive noun.