There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Marites'
Add an apostrophe s ('s) after the existing s at the end of the word: Marites's
Examples:
Marites' brother helped her with her homework.
Marites's brother helped her with her homework.
Note: The name of a person is a proper noun. A proper noun is always capitalized.
The possessive form of the name "Marites" is "Marites's."
The possessive form for the name Adams is Adams'.
The possessive form of the proper noun Henry is Henry's.Example: Henry's party is this Saturday.
The possessive form is Lois's.This is Lois's birthday.
The possessive form of the noun guest is guest's.Example: What is the guest's name?
To form the plural possessive form for names, add an apostrophe and an "s" after the plural form of the name. For example, if the name is "Smith" and it is pluralized as "Smiths," the plural possessive form would be "Smiths'.
The possessive form of the proper noun Lucky is Lucky's.Example: Lucky's collar has his name on it.
The possessive form of the noun fiance is fiance's.Example: Her fiance's name is Hector.
singular possessive: boy'splural possessive: boys'
The possessive form of host is host's.
The possessive form for the noun puppy is puppy's.Example: The puppy's name is Felix.
The possessive form of the noun caller is caller's.Example: The caller's name was Mr. Frederick.
The possessive form of the noun musician is musician's.Example: The musician's name is Frederick.