The correct plural possessive form is "your parents' car".
example: I see a new boat attached to your parents' car.
The plural possessive is parents' meeting.
The plural form of the noun parent is parents.The plural possessive form is parents'.example: The parents' committee has been able to acquire the athletic equipment.
The possessive form of the plural noun parents is parents'.Example: We're having a party for my parents' anniversary.
The possessive form for the plural noun parents is parents'.Example: The parents' committee has arranged the field trip.
parents'
The noun parents is the plural form of the noun parent.The noun parents' is the plural possessive form of the noun parent.Example uses of the nouns:I'm making dinner for my parents. (plural)I'll be staying at my parents' house. (plural possessive, the house of my parents)
The correct possessive form for the noun parent is parent's.Example: A parent's note is required for any class absence.
The plural form of the noun car is cars.The plural possessive form is cars'.example: All of their cars' prices were much to high.
The plural form of the noun car is cars.The plural possessive form is cars'.example: All of their cars' prices were much to high.
The possessive form of the plural noun parents is parents'.Example: I'm planning a party for my parents' anniversary.
The possessive form for the plural noun parents is parents'.Example: My parents' house is nicely landscaped. (the house of my parents)
The possessive form for the plural noun parents is parents'.Example: The parents' committee has arranged the field trip.