The possessive form of the singular, proper noun Vietnamese is Vietnamese's.
Example: The Vietnamese's passport is in order, the others' are not.
Note: The noun 'Vietnamese' is a word for a person from Vietnam.
The word Vietnamese is also an adjective, a word used to describe a noun.
Example: He carried a Vietnamese passport.
The singular possessive form of Vietnamese is "Vietnamese's."
The singular possessive form of "test" is "test's".
The singular possessive pronouns are "my," "mine," "your," "yours," "his," "her," and "its."
The singular possessive form of "classmate" is "classmate's."
The singular possessive form of county is county's.
The singular possessive form is week's.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form of "test" is "test's".
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
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
The singular possessive form of "classmate" is "classmate's."
The singular possessive is Martin's.
The singular possessive is fish's.
Grave's is the singular possessive.
Buzz's is the singular possessive.
The singular possessive is biker's; the plural possessive is bikers'.