Understanding how to show possession with an apostrophe is a fundamental part of mastering English grammar. Whether you are writing for academic purposes, creating content for a website, or simply crafting a personal letter, correctly using the apostrophe to indicate ownership is essential. Misplacing or omitting it can lead to confusion or completely change the meaning of a sentence. In this topic, we will explore the various rules and exceptions that govern how to use apostrophes to show possession clearly and effectively.
Basic Rule of Possession with Apostrophes
What Is Possession?
Possession in grammar refers to ownership or a close relationship between two nouns. To show possession, English uses apostrophes along with the letter s in most cases. This is known as the possessive form.
General Rule for Singular Nouns
To show possession with a singular noun, add an apostrophe followed by an s.
- Example The cat’s toy (The toy that belongs to the cat)
- Example Sarah’s book (The book that belongs to Sarah)
- Example The teacher’s desk (The desk that belongs to the teacher)
This rule applies even if the singular noun ends in s.
- Example The boss’s report (The report belonging to the boss)
- Example The class’s schedule (The schedule of the class)
Possession with Plural Nouns
Regular Plural Nouns Ending in s
For regular plural nouns that already end in s, simply add an apostrophe after the s. Do not add another s.
- Example The dogs’ bowls (The bowls of the dogs)
- Example The students’ assignments (The assignments belonging to the students)
- Example The parents’ meeting (The meeting of the parents)
Irregular Plural Nouns Not Ending in s
If the plural noun is irregular and does not end in s, add an apostrophe and an s.
- Example The children’s toys (The toys of the children)
- Example The men’s restroom (The restroom used by men)
- Example The women’s committee (The committee of women)
Compound Nouns and Joint Possession
Compound Nouns
When working with compound nouns or hyphenated words, add the apostrophe + s to the last word in the compound.
- Example My sister-in-law’s dress (The dress of my sister-in-law)
- Example The editor-in-chief’s topic (The topic written by the editor-in-chief)
Joint Possession
When two or more people jointly own something, add the apostrophe + s to the last noun only.
- Example Jack and Jill’s house (The house shared by Jack and Jill)
- Example Tom and Jerry’s show (The show that belongs to both Tom and Jerry)
Separate Possession
When two people own different things, add apostrophe + s to each name.
- Example John’s and Maria’s phones (John’s phone and Maria’s phone)
- Example Lily’s and Emma’s bags (Two separate bags belonging to Lily and Emma)
Using Apostrophes with Indefinite Pronouns
To show possession with indefinite pronouns like anyone, someone, nobody, or everybody, add apostrophe + s.
- Example Someone’s hat (The hat belonging to someone)
- Example Everybody’s opinion (The opinion of everybody)
Do not use apostrophes with possessive pronouns like his, hers, its, ours, or theirs. These are already possessive and do not need an apostrophe.
- Correct The decision is hers.
- Incorrect The decision is her’s.
Possession in Time Expressions
Time expressions also use apostrophes to show duration or association.
- Example A day’s work (Work of one day)
- Example Two weeks’ notice (Notice of two weeks)
- Example A year’s salary (Salary for a year)
When the time expression is plural, place the apostrophe after the s. When it is singular, place the apostrophe before the s.
Possessive Form of Acronyms and Abbreviations
You can show possession with abbreviations by following the standard apostrophe rules.
- Example NASA’s mission (The mission of NASA)
- Example The CEO’s office (The office of the CEO)
- Example The VIPs’ lounge (The lounge for VIPs)
Common Mistakes with Apostrophes
Apostrophes for Plurals
Do not use apostrophes to form plurals. This is one of the most common grammar mistakes.
- Incorrect Apple’s are sweet.
- Correct Apples are sweet.
Confusing It’s and Its
It’s is a contraction for it is or it has, while its is the possessive form of it.
- Correct It’s raining today. (It is raining today)
- Correct The cat licked its paw. (Possession)
When Not to Use an Apostrophe
As mentioned, apostrophes are not used with possessive pronouns such as
- His
- Hers
- Its
- Ours
- Theirs
These are already possessive and adding an apostrophe would be incorrect.
Best Practices for Showing Possession
- Always determine whether the noun is singular or plural.
- Apply the correct rule based on the number and structure of the noun.
- Avoid adding unnecessary apostrophes to plurals.
- When in doubt, rephrase the sentence to check for clarity.
For example, instead of writing The dog’s tail was wagging, you can rephrase to The tail of the dog was wagging to double-check the meaning.
Learning how to show possession with apostrophes is a valuable skill that enhances the clarity and professionalism of your writing. By following simple grammar rules such as knowing when to add apostrophe + s or when to place the apostrophe after the s you can avoid common errors. Whether you are working with singular or plural nouns, compound structures, or time expressions, applying the rules consistently will make your writing more precise. Apostrophes may seem like small marks, but they play a big role in effective communication.