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Punctuation Point: Possessing the Apostrophe

Erin Brenner of Right Touch Editing provides "bite-sized lessons to improve your writing" on her engaging blog The Writing Resource. In the latest installment of Erin's series on the correct use of punctuation, she offers tips on using the apostrophe to create possessive nouns.
The apostrophe is one of those pieces of punctuation that get a lot of people in trouble. It looks like a comma that hangs in the air rather than on the line and causes writers no end of confusion.
The apostrophe has three main uses:
- It shows possession for a noun.
- It shows the omission of some letters in a word.
- It shows plurality of single letters, single numbers, and acronyms.
Today, we'll go over the basics of the first rule: creating possessive nouns. We humans love to collect things (just ask George Carlin). We pick stuff up wherever we go, and we want the world to know what belongs to us — especially when we write about it. Possessive nouns and pronouns show that ownership. Positioned correctly, that hanging comma — the apostrophe — shows you who owns what.
That's Our Stuff
Let's start with the easy bit: plural nouns. If the plural noun ends in an s, add an apostrophe:
boxes' labels
The Brenners' house
If the plural noun does NOT end in s (an irregular noun), you add apostrophe s:
children's toy
women's shoes
men's coat
So far, so good. Now let's look at singular nouns.
That's My Stuff
Whether you use just an apostrophe or an apostrophe s to make a singular noun possessive depends largely on your style guide. Most singular nouns are made possessive with an apostrophe s (this is actually the base of the apostrophe rule and why most lessons start there):
Sean's book
Some usage books and style guides will tell you to use an apostrophe s for all singular nouns, whether they end in s or not. Garner and Chicago use this rule:
James's toy
The bus's wheels
There are, of course, exceptions to this rule. Biblical and Classical names that end with a /zes/ or /eez/ sound get just an apostrophe:
Jesus' way
Moses' commandments
Aristophanes' plays
Plural nouns that have a singular meaning get just an apostrophe:
politics' true meaning
economics' forerunners
the United States' policy on terrorism
A sibilant possessive (the noun ends in an /es/ sound) before the word sake gets just an apostrophe:
appearance' sake
goodness' sake
conscience' sake
AP is slightly different. Use apostrophe s for singular nouns and follow the same "use just an apostrophe" exceptions that Garner and Chicago outline. But AP wants you to follow two more exceptions. If you have a proper noun that ends in s or a singular noun that ends in s and is followed by a word that begins with s, you add just an apostrophe:
James' toy
hostess' seat
And if you're following a completely different style guide, your best bet is to look up its rule.
Pronouns Are Different
If the noun is a personal pronoun, you don't need to worry about the apostrophe at all, as English offers a complete set of possessive pronouns:
my/mine
your/yours
his, her/hers, its
our/ours
your/yours
their/theirs
Writers often get confused with its. If you see it's, you're dealing with a contraction: it is. If you see its, you're dealing with a possessive pronoun.
You Mean There's More?
As you start to pay attention to the apostrophe, you'll see other situations that make you pause: compound words, joint possession, quasi-possessives, and more. I'll cover these rules (and the other two uses) in a future post. Until then, if you have a specific example you'd like help with, leave a comment below and I'll help you out.
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Comments from our users:
I wish this information appeared in front of those persons making signs in stores, especially the "it's" and "its" formulations.
Thank you for offering your help.
Your tips about possessive apostrophe were very useful. They reminded me of my old learnings about this part of grammaar and prompted me to ask you two questions for clarification. I have learnt that if we want to attribute a thing to a person like book to John we use apostrphe s ( John's book). But if we want to attribute a thing to another thing like wheels to bus, we use 0f (the wheels of the bus). In some of your examples, like 'The bus's wheels' and 'politics' true meaning' I am confused. If you could kindly provide some explanation about them and also show the ending pronunciation of the following examples of your lesson , I would really appreciate. Examples : Jesus' way, Moses' commandments, Aristophanes' plays, politics' true meaning, James' toy and hostess' seat. Do they end with an eez sound?
Thanks again for your time.
David: a plural noun with a singular meaning can still possess something, just as a singular noun or another plural noun can. Perhaps the way to think of it is that all plural nouns that end in "s" take just an apostrophe, no matter if their meaning is in the singular sense or plural. It may be one of those rules that you just have to memorize or (perhaps better) just have to look up each time. My copy of Chicago is full of flags for that very reason.
Farideh: you can indeed use the apostrophe to attribute one thing to another, as in "the bus's wheels." I have never heard of not being able to.
As for why just an apostrophe with certain words, it generally reflects how the word is pronounced, at least according to the "Chicago Manual of Style." However, it really is a style issue that not everyone agrees on. I might say "politcs' true meaning" without an /eez/ sound in "politics," but I think I'd say "Jesuseez way," adding an /eez/ sound to the end of "Jesus." Even Chicago will have you use apostrophe "s" for proper names, whether they end in "s" or not.
Is this carelessness on my part somewhere along the way? Aristophanesez just doesn't 'sound right', and I can't imagine saying Jamez book instead of Jamezez book.
The prim and proper grammar teachers and copy editors will usually disagree with me, but, just check out the popular writers and their works. They are speaking to their paying audiences, not the editor or teacher.
I have an interesting signage example, which I have often wondered about: the word on the sign outside men's public toilets (!) - in the UK at least it's a contraction of the plural possessive "Gentlemen's", and is invariably written "Gents"; but should it be "Gent's" or "Gents'"? By comparison, the companion sign is more simply written "Ladies" - but I guess that should be "Ladies'" if we're being pedantic...
[Thanks for spotting the error -- it's been fixed! —Ed.]
Again some might defend that there is no clearer way of writing: "mind your p's and q's"â¦but how about "mind your pees and cues". Same idea follows for questions like these: "how many s's are there in possess?" (loses its clarity when the letter in questions needs that same letter to make it plural - apostrophe in between or not! Why not: "how many esses are there in possess?". Context make this clear even if people aren't so used to seeing letters spelt out and it avoids one thinking that one has to put an appostrophe wherever and whenever one becomes unsure - that's what appears to be the case nowadays. Could I get a treatise/feature article from one, or more, of you grammar gurus on one, or more, of my above points? It's high time!