Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
classmates's
Grammar usage guide and real-world examplesUSAGE SUMMARY
The word "classmates" is correct and usable in written English.
It is used to refer to the people one studies with in a class or group, typically at the same school or college. For example: "My classmates and I worked together on our group project."
⚠ May contain grammatical issues
News & Media
Alternative expressions(1)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
He plays Walter Black, CEO of a toy manufacturer, married to Meredith (Foster, acting too), with two sons: Porter, a nervy 17-year-old (Anton Yelchin) who runs an implausibly lucrative business ghosting classmates's homework; the other a standard-issue moppet, forever chirping all-too-apt naïveities.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Ruelas told KCEN that he's more concerned about his classmate's health than his suspension.
News & Media
It's not your very, very short classmate's fault that he/she is smaller than you.
Wiki
That's a lot to see your high school classmate's backyard tomato plant.
News & Media
It's not so easy to gaze into a classmate's eyes when you're sixteen.
News & Media
The classmate's mother, however, was horrified.
News & Media
That fall, we egged a classmate's home.
News & Media
But between manicures and later putting on their gowns, many detoured to their classmate's wake.
News & Media
Include a quote from the article and one classmate's opinion in your response.
News & Media
With a disconcertingly casual expression, their teacher hits the classmate's feet repeatedly with a stick.
News & Media
Following her classmate's lead, she chose AuthorHouse and bought one of the lower-cost packages.
News & Media
Expert writing Tips
Best practice
Avoid double possessives like "classmates's". Opt for clearer alternatives like "classmates'" or "belonging to a classmate" for better readability and grammatical correctness.
Common error
Many writers incorrectly use "classmates's" thinking it denotes possession for multiple classmates. Instead, use "classmates'" which is the standard plural possessive form. For example, "the classmates' project" is correct.
Source & Trust
87%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "classmates's" is intended as a possessive noun phrase, aiming to show ownership or association. However, this form is generally considered grammatically incorrect in standard English. Instead, Ludwig suggests using "classmates'" (plural possessive) or "classmate's" (singular possessive), depending on the context.
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, while the phrase "classmates's" attempts to show possession, it's generally considered grammatically incorrect. According to Ludwig, standard English offers clearer and correct alternatives such as "classmates'" for plural possession or "classmate's" for singular possession. Given the rare occurrence and the presence of more grammatically sound options, it's advisable to avoid "classmates's" in both formal and informal writing to maintain clarity and correctness.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
classmate's
Singular possessive form; use when referring to a single classmate.
classmates'
Plural possessive form; use when referring to something belonging to multiple classmates.
the classmates' item
Another way to express plural possessive
belonging to classmates
Rephrasing to clearly indicate possession without using the possessive form.
of a classmate
Utilizes "of" to denote possession in a clearer, grammatically sound way.
property of classmates
More explicit phrasing indicating ownership by classmates.
the possession of the classmate
Indicates a singular possessive form.
work of a classmate
Suggests the creation by a classmate.
possession of classmates
Formal way to talk about the ownership of classmates.
item owned by classmates
Explicitly specifies an item being the possession of classmates.
FAQs
How do I properly show possession for multiple classmates?
Use the plural possessive form "classmates'" to correctly indicate that something belongs to more than one classmate. For example, "the "classmates' project"".
What is the difference between "classmate's" and "classmates'"?
"Classmate's" refers to something belonging to a single classmate, while "classmates'" indicates possession by multiple classmates. Avoid "classmates's" as it is grammatically incorrect. For example, "classmate's book" versus "classmates' books".
When should I use a phrase like "belonging to classmates"?
Use "belonging to classmates" when you want to avoid possessive forms altogether or when the possessive would sound awkward. For example, instead of "the classmates' shared workspace", you might say "the workspace "belonging to classmates"".
Is "classmates's" ever correct?
No, "classmates's" is generally considered a grammatical error in standard English. It attempts to create a double possessive, which is not a recognized form. Always use either "classmate's" (singular) or "classmates'" (plural).
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
2.8/5
Expert rating
Real-world application tested