When the nouns of a compound subject or object share or possess the same thing, use just one apostrophe for the last noun of the compound group.
Example: I made a cake for Jane and Mary's party.
When the nouns of a compound subject or object have each their own, then both nouns are possessive.
Example: Jane's and Mary's grades have improved.
The plural form of the proper noun Mary is Marys.The plural possessive form is Marys'.example: The two Marys' last names are Brown and Green.
The singular possessive form is heart's; the plural possessive form is hearts'.
The correct singular possessive form is Jane's.example: I met Jane's brother at the party.The correct plural possessive form is Janes'.example: The two Janes' last names are Green and Brown.
The plural of rose is roses. The plural possessive is roses'.
The plural form is homes; the plural possessive is homes'.
The plural form of the proper noun Mary is Marys.The plural possessive form is Marys'.example: The two Marys' last names are Brown and Green.
Singular possessive: go-between'sex. "My go-between's job is difficult."Plural: go-betweensex. "How many go-betweens does Mary have running around for her?"Plural possessive: go-betweens'ex. "Mary's many go-betweens' jobs are quite difficult."
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The possessive adjective 'your' is placed before a noun to show that the noun belongs to a singular or plural noun or nouns for two or more people. Examples:singular: Jane, I brought your lunch.plural: Jane and Jack, your lunch is on the table.plural: Class, it's time for your lunch now.singular: Excuse me miss, you left your book on the counter.plural: Your room looks very nice, girls.
The plural is lads. The plural possessive is lads'.
The plural is relatives. The plural possessive is relatives'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is inches. The plural possessive is inches'.
The plural possessive of stepsister is stepsisters'.
The plural form is echoes. The plural possessive is echoes'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.