The possessive form of the singular noun yo-yo is yo-yo's.
The possessive form of the plural noun yo-yos is yo-yos'.
Examples:
My yo-yo's string is broken. (singular)
Look, someone cut all of the yo-yos' strings. (plural)
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The singular possessive is biker's; the plural possessive is bikers'.
The word sisters' is plural possessive. The singular is sister, singular possessive is sister's; the plural is sisters, the plural possessive is sisters'.
The singular possessive is army's.The plural possessive is armies'.
The singular possessive is avocado's; the plural possessive is avocados'.
Singular possessive: mother's Plural possessive: mothers'
Niece's is a singular possessive noun. niece - singular nieces - plural niece's - singular possessive nieces' - plural possessive
Women's is a plural possessive. The singular possessive is woman's
The singular possessive form is heart's; the plural possessive form is hearts'.
The singular possessive form is headdress's. The plural possessive form is headdresses'.