How to use an apostrophe after s: A guide to plural possessives
Mastering apostrophe placement
Using an apostrophe after s is the primary way to show possession for plural nouns. This guide covers how to identify plural forms, apply the 'after-the-s' rule for groups, and handle singular names ending in s. Follow these steps to ensure your academic writing remains grammatically precise and professional.
Step 1: Determine if the noun is plural
Before placing an apostrophe, you must confirm the number of owners. If the noun refers to more than one person, place, or thing and ends in s, the apostrophe almost always goes after that s. For example, if you are discussing a single teacher, the noun is teacher. If you are discussing a group, the noun is teachers. Always establish the base plural form of the word before considering punctuation.
Step 2: Apply the apostrophe to plural nouns ending in s
For standard plural nouns that end in s, simply add the apostrophe after the final letter. Do not add an additional s after the apostrophe. This indicates that the entire group possesses the following object. Write the students' grades to show the grades belong to the whole class. Write the companies' policies to refer to the rules of multiple organizations. This rule applies to almost all regular English plurals.
Step 3: Handle singular names ending in s
When a singular proper noun (a name) ends in s, such as Charles or Williams, you have two options depending on your style guide. MLA and APA typically require an apostrophe and an additional s (Charles's book). However, some writers prefer to use only the apostrophe (Charles' book). In academic essays, it is safer to add the extra s to reflect how the word is pronounced. Be consistent throughout your entire paper.
Step 4: Treat irregular plurals differently
Irregular plural nouns do not end in s. Words like men, women, children, and people follow the singular rule for possession. To show ownership for these groups, add an apostrophe followed by an s. Write the children's toys or the people's choice. Never place an apostrophe after the n or e in these words without the following s, as they do not follow the standard plural s-ending rule.
Apostrophe placement in essay context
Review these examples of correct apostrophe usage in academic sentences: `Correct: The participants' responses were recorded over a six-month period.` `Correct: Despite the Joneses' objections, the city council approved the new park.` `Correct: We must consider the media's influence on the public's perception.` `Incorrect: The participant's responses (referring to a group) were recorded.`
Common mistakes to avoid
Avoid these frequent errors when using apostrophes with the letter s:
- Pluralizing without possession: Never use an apostrophe just to make a word plural. Write the 1990s, not the 1990's.
- Its vs. It's: Its is the possessive form and has no apostrophe. It's is a contraction for 'it is'.
- Misplacing the apostrophe in 's: Placing the apostrophe before the s when you mean plural (e.g., the student's vs the students') changes the meaning from many owners to one owner.
- Double s on plurals: Never write the players's. If the word is already plural and ends in s, the apostrophe is the final character.
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