Both the singular and plural form is corps; the singular or plural possessive is corps'.
The singular possessive is fish's.
Buzz's is the singular possessive.
The possessive form is Amos's.
The singular possessive form is foot's.
The singular possessive form is box's.
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 "my," "mine," "your," "yours," "his," "her," and "its."
The singular possessive of dish is dish's
Grave's is the singular possessive.
The singular possessive form of "test" 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.
No, "Chris's" is a singular possessive noun. It shows that something belongs to Chris.