Possessive Determiners

You're halfway through a worksheet and the sentence reads: "___ dog chased ___ ball across the playground." You know exactly whose dog it was and whose ball it was — you can picture the whole thing — but which word actually goes in the gap? My? Mine? Her's? Hers? Her? And why does the answer feel so obvious when you say it out loud, but suddenly wobbly the moment you have to write it down?

Here's the thing. You've been using these words correctly since you were about two years old. "My teddy." "Her turn." Nobody sat you down with a chart — you picked it up from the people around you, the way you pick up how to catch a ball. What trips people up isn't the words themselves. It's writing them down under pressure, or working out what to do the moment a sentence gets a bit more complicated than "my teddy." That's what we're sorting out here.

We're only dealing with one small family of words in this article — my, your, his, her, its, our, their. These are called possessive determiners, and they always sit right in front of a noun. We'll also glance sideways at their cousins, mine, yours, his, hers, its, ours, theirs — the ones that stand alone — but the full lesson on those lives in another article. Nobody's born knowing which is which. By the end of this one, you will.

Before you read on, here's where we're heading. By the end you'll be able to: - Spot possessive determiners (my, your, his, her, its, our, their) and know exactly what job they're doing in a sentence. - Get the word order right when adjectives get involved — "my old dog," not "old my dog." - Avoid the classic mix-up between her and words like hers, or their and there. - Tell a possessive determiner apart from a possessive pronoun — and know where to go for the full lesson on that.

Beginner (Foundation)

Let's start with a word that sounds scarier than it is: determiner. A determiner is just a small word that sits in front of a noun and tells you something about it before the noun even arrives. The cat. A biscuit. This homework. All determiners — quiet little advance warnings about the noun that's coming.

Possessive determiners do the same job, but the useful information they give is whose. Instead of pointing at something (that dog) or counting it (one dog), they tell you who it belongs to, or who it's connected with. There are seven of them, and I'd bet you already know all seven without thinking:

• my — my school bag
• your — is that your pencil?
• his — his trainers are muddy
• her — her essay was three pages long
• its — the hamster nudged its water bottle
• our — our classroom smells of paint today
• their — their team won the quiz

Notice the pattern: every single one is followed by a noun. My bag. Your pencil. His trainers. That's the giveaway that tells you it's a determiner and not something else — a possessive determiner never stands alone in a sentence. You can't say "This bag is my" and stop there. It needs a noun stuck onto it: "This bag is my bag" (a bit clunky, but correct), or more naturally, "This bag is mine." That second word, mine, is doing a different job — it's a possessive pronoun, and we'll come back to that shortly.

One more thing while we're being careful: none of these seven words ever takes an apostrophe. Write its paws, not it's paws, when you mean "belonging to it." (It's, with the apostrophe, means it is or it has — a completely different word that just happens to sound the same. We'll flag this once more below, and the full fix lives in another article.)

Pro-Tip: If you can put "belonging to" in front of the word and the sentence still makes sense — my dog = the dog belonging to me — you're looking at a possessive determiner.

Quick recap: - A determiner is a small word that goes before a noun and tells you something about it. - Possessive determiners — my, your, his, her, its, our, their — tell you whose. - Every possessive determiner needs a noun straight after it; it can't stand on its own. - None of them ever takes an apostrophe: its, not it's, when you mean "belonging to it."

Intermediate (Development)

Right, now for the bit that actually causes mistakes — because on their own, these seven words are easy. Trouble starts when other words want to join the sentence too.

Word order in the noun phrase

Here's the rule that matters most: a possessive determiner always comes first, before any adjectives, and everything lines up behind it, right up to the noun:

possessive determiner → (numbers) → adjectives → noun their → two → noisy little → dogs

Some examples:

• "my scruffy old rucksack" — not "scruffy my old rucksack"
• "their bright red kite got stuck in the tree"
• "her brand-new trainers squeaked on the gym floor"
• "our two remaining tickets"

Try flipping the order and you'll hear immediately that it's wrong: "scruffy my old rucksack" just doesn't sound like English, because it isn't.

You only get one determiner per noun

Here's the rule that trips people up more than any other: you cannot combine a possessive determiner with another determiner in front of the same noun. English only allows one determiner in that front slot. "The my book" is wrong — always wrong, no exceptions — and so is "this her bag." You have to choose:

• ❌ the my book → ✅ my book or ✅ the book
• ❌ this her bag → ✅ her bag or ✅ this bag

This slip usually happens when you're translating a thought too literally, or typing fast and doubling up out of habit. It's an easy fix once you know to look for it.

Common Mistake: Writing "the my book" or "this her bag." Remember — one determiner only. Pick the or my, not both.

A neat extra word: own

There's a small emphasis word, own, that slots in right after a possessive determiner: "I've got my own room now," "he made his own lunch." Own never appears by itself — it always leans on a possessive determiner in front of it.

Determiner vs pronoun — the line that matters

Now for the contrast I promised. My, your, his, her, its, our, their sit before a noun. Their cousins — mine, yours, his, hers, its, ours, theirs — replace the noun entirely and stand alone:

That's my bag. → That bag is mine. Is this your homework? → Is this homework yours?

Notice his and its look identical in both jobs — that's just one of those quirks of English you learn to live with. These stand-alone words are called possessive pronouns, and they get their own full lesson, including exactly how its differs from the sneaky it's, in H2.4: Possessive Pronouns. I'll flag the headline point here because it matters, but the full fix lives there: its (no apostrophe) is the determiner — "the dog wagged its tail" — while it's (with an apostrophe) is short for "it is" or "it has." If that's the one that keeps catching you out, H2.4 is where to go.

Common Mistake: Writing "her's," "our's," or "their's" with an apostrophe, because it feels like a possessive noun ("the dog's bone"). Don't. None of the possessive pronouns ever take an apostrophe — it's hers, ours, theirs, no exceptions.

Their, there, they're — and its, it's

Two quick sorting jobs, because exams love these:

• their = possessive determiner → "their bags"
• there = a place → "over there"
• they're = "they are" → "they're coming"

Only their can sit in front of a noun. And:

• its = possessive determiner → "its fur"
• it's = "it is" or "it has" → "it's raining"

Only its can sit in front of a noun. For the full explanation of both these homophone traps, plus whose/who's, see H2.4 — we're only flagging them here, not re-teaching them.

Quick recap: - Possessive determiners come first in the noun phrase, before numbers and adjectives: our two old bikes. - You can't double up determiners — "the my book" is always wrong; choose one. - Own can follow a possessive determiner for emphasis: my own diary. - Determiners (my) sit before a noun; pronouns (mine) stand in for one — full lesson at H2.4. - Only their and its can sit right before nouns; there/they're and it's can't (full fix at H2.4).

Advanced (Mastery)

Once you're comfortable with the basics, a few genuinely interesting wrinkles are worth knowing — the kind of thing that makes your writing (and your understanding of why English behaves this way) noticeably sharper than most of your classmates'.

Singular "their"

You've probably written a sentence like "Somebody left their jumper in the changing room" without a second thought — and you were right not to worry. Using their when you don't know, or don't need to specify, someone's gender is standard, accepted English, backed by pretty much every major dictionary and style guide. It isn't new slang, either; writers have done this for centuries. In very formal writing — a serious school report, a formal exam answer — some older-fashioned markers still expect "his or her." Both are correct; one just sounds a touch more traditional.

Pro-Tip: When you're writing about "a student," "someone," or "anyone" and the gender doesn't matter, their is natural and now widely accepted: "Each student must bring their own pen."

People vs things — and where the line blurs

The rough guide is: his/her/their for people, its for animals and things. But real life is messier. Pets are often given human pronouns because we feel close to them — "The dog wagged his tail," "The cat wants her dinner." And organisations sometimes take its even though they're made of people: "The company raised its prices." Neither of these is a mistake; they're just choices about how close or distant you want the writing to feel.

Possessive determiner vs possessive noun

There are two separate ways to show ownership in English, and it's worth knowing they exist side by side:

• Possessive determiner + noun: "my teacher," "their house"
• Possessive noun with apostrophe + noun: "the teacher's car," "the children's coats"

These sometimes mean almost the same thing, sometimes not quite. And you can combine them: "my friend's bike" is my (determiner) + friend's (possessive noun) + bike. The detailed rules for where the apostrophe goes live in H1.4 — this article only needs you to notice that the two tools are different and can work together.

Possessive determiners in longer phrases

Possessive determiners don't always sit next to the noun you're most interested in:

• "my last year at primary school"
• "their plans for the summer holidays"

Here, the determiner is attached to the head noun — year, plans — even though your attention is really on school or holidays. If you're ever analysing a sentence closely, find the head noun the determiner belongs to, not the noun at the very end of the phrase.

Style and emphasis

Swapping the possessive determiner can quietly change the tone of a sentence:

• "It's my decision." — personal, maybe a little firm.
• "It's our decision." — shared, more collective.
• "That's your problem." — can sound neutral or pointed, depending on how you say it.

In stories, this matters too: "I held my little sister's hand" feels close and warm; "I spoke to the girl next to me" feels more distant. Choosing the right possessive determiner is part of choosing the right feeling.

Common Mistake: Writing "me and my friend's project" when you mean the project belongs to both of you. Cleaner: "our project." In almost every everyday case, our is the tidiest fix.

Quick recap: - Singular their is standard, accepted English for an unspecified or generic person. - Use his/her/their for people and its for things, but pets and organisations can bend that rule. - Possessive determiners and possessive nouns (apostrophes) are separate tools that can work together. - Possessive determiners attach to the head noun of a phrase, not always the last noun. - Changing my/our/your/their can subtly shift the tone or feeling of a sentence.

UK vs US Note

The possessive determiners themselves work identically in UK and US English — my, your, his, her, its, our, their are used in exactly the same positions, with exactly the same meanings, on both sides of the Atlantic. The only differences you'll ever spot are in the spelling of the other words nearby, for example "my favourite [US: favorite] book" or "our neighbours' [US: neighbors'] garden." The determiner rules themselves never change.

Key Takeaways

• Possessive determiners are my, your, his, her, its, our, their, and they always come before a noun.
• Word order is fixed: determiner → (numbers) → adjectives → noun, e.g. "our two loud dogs."
• You can never stack two determiners: "the my book" is always wrong.
• Possessive determiners (my) are different from possessive pronouns (mine), which stand alone — full lesson at H2.4.
• Its vs it's and their/there/they're are homophone traps flagged here, fully explained at H2.4.
• Singular their is now standard English for an unspecified or generic person.

Check Your Understanding

1. Fill the gap with the correct possessive determiner: "___ old bike has a flat tyre." (Belonging to him.)
2. Spot and fix the mistake: "This is the my seat."
3. Choose the correct word: "The cat licked ___ / it's paw."
4. True or false: hers should be written with an apostrophe, like "her's."
5. Rewrite this clunky sentence using a possessive determiner instead of repeating the name: "Priya picked up Priya's coat."

Answer key:

1. His — "His old bike has a flat tyre."
2. Two determiners are stacked. Fix: "This is my seat" or "This is the seat."
3. Its — the possessive determiner, not the contraction it's.
4. False — it's hers, no apostrophe, ever.
5. "Priya picked up her coat."

Internal Links

• H5.1 — Determiners: the determiner slot and how it works across articles, demonstratives, and possessives.
• H2.4 — Possessive pronouns (mine, yours, his, hers, its, ours, theirs) and the full, canonical fix for its/it's and whose/who's.
• H1.4 — Possessive nouns and apostrophes (the dog's bone, the girls' coats).

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