The possessive form of the proper noun Diaz is Diaz's.
Example: Ms. Diaz's phone is ringing.
There are two accepted forms for possessive singular nouns that end with an s:
Add an apostrophe (') after the existing s at the end of the word:
Examples:
The meeting is being held in Ms. Dobos' office.
The meeting is being held in Ms. Dobos's office.
Brentano's, a historic bookstore located in Paris, closed its doors in 2019 after operating for over 120 years. It was a beloved literary institution known for its vast selection of books, particularly in the French language.
The possessive form of "synopsis" is "synopsis's" or "synopsis'."
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 for the singular noun Peter is Peter's.
Example: I met Peter's parents at the picnic.
The possessive form for the plural noun Peters is Peters'.
Example: The two Peters' fathers are brothers.
The possessive form for the proper noun Francis is Francis's.
Example: Mr. Francis's classroom is at the end of the hall.
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; for example:
"I put the memo on the boss' desk."
Add an apostrophe s ('s) after the existing s at the end of the word; for example:
"I put the memo on the boss's desk."
I personally write the singular possessive form based on how I say the possessive phrase. If you are a student, use the form that is preferred by your teacher.
The possessive form of the proper noun Mr. Kent is Mr. Kent's.
example: Mr. Kent's classroom is on the second floor.
Sherlock Holmes's is the more proper form though Sherlock Holmes' is also acceptable. Please check the link below.
The plural possessive noun of "author" is "authors'".
The possessive form of the proper noun Benjamin is Benjamin's.
Example: Have you met Benjamin's brother?
The noun dickens (lower case d) has no possessive form, it is a word used for emphasizing a question to express surprise or anger (Who the dickens was that?). To some, using the noun dickens is a euphemism for invoking the devil.
The possessive form for the proper noun Dickens is Dickens's. The possessive of all English singular nouns is formed by adding -'s. Singular nouns already ending in -s acquire a new syllable, along with the -'s of the possessive.
There are two accepted forms that show possession for singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Atticus'
Add an apostrophe s ('s) after the existing s at the end of the word:
Atticus's
Examples:
Atticus' children are Jem and Scout.
Atticus's children are Jem and Scout.
The possessive form of the singular noun librarian is librarian's.
Example: The librarian's desk was stacked with books.
The plural form is founders. The plural possessive is founders'.
The plural possessive form of Dr. Lewis is "the Lewises'."
The possessive form of the plural noun founders is founders'.
Example: We have a bronze plaque with our founders' names.
There are two accepted forms for possessive singular nouns that end with an s:
Add an apostrophe (') after the existing s at the end of the word: Williams'
Add an apostrophe s ('s) after the existing s at the end of the word: Williams's
Examples:
Jim Williams' house is number four.
Jim Williams's house is number four.
The possessive form of the singular noun William is William's.
Example: I like William's new car.
The possessive form of "critic" is "critic's." For example, "The critic's review was very insightful."
The singular possessive form of "Robert Frost" is Robert Frost's.
The word 'author' is a noun, a word for a person.
The word 'purpose' is a noun, a word for an idea.
The possessive form of the noun phrase 'the purpose of the author' is 'the author's purpose'.
The noun author's is a possessive noun form.
The word writers is the plural form of the noun writer.
example: "These writers were good friends."
The word writer's is the possessive form. The 's indicates that something belongs to a writer.
example: "This was the writer's first book."