Determiners 101

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As far as grammar goes, determiners are about as small as you can get; they're the words like "an" or "this" which get tacked on in front of nouns. These important little words are so very easy to overlook, but also tell us a lot of key information about the nouns that they are linked to. Determiners can tell us how many of the noun we're dealing with, or whether it's specific or general. They can also communicate particularities like association and ownership. Using the wrong determiner can vastly change the meaning of your sentence, so it's important to get them right!

There are four main categories of determiners with their own distinct jobs: those defining a noun's level of specificity, those which frame that specificity in relation to the speaker/writer, those showing possession or association, and those which communicate the quantity of the noun. Let's explore them all in turn.

Articles

There are exactly three words categorised as articles: "a", "an", and "the". We use them to indicate whether the noun they're connected to is something specific (definite) or non-specific (indefinite). If we're referring to a particular noun that has been previously established or is uniquely named (like a ship), we would use the definite article "the". For less particular nouns that we're referring to in general or introducing for the first time, we would prefer one of the indefinite articles, "a" or "an". For example, if I say I'm looking for the blue yarn, you can bet that I know exactly which yarn I want, whereas if I'm seeking a blue yarn you know that I'm keeping my options open.

It's important to make sure that you're using the correct type of article, because whether something is definite or indefinite has a massive effect on the meaning of the phrase. For example, using a definite article instead of an indefinite one in the sentence "I patted the cute dog on my walk this afternoon" implies that there is a particular cute dog that the person you're speaking to already knows about, and that this is the specific dog you encountered; if you've never mentioned this dog before your audience will feel like they're missing something important. On the other hand, if you use an indefinite article instead of a definite one, the implication is that your specific noun is just one of many, which might be confusing if you were to say you visited "a Taj Mahal" on your holiday.

When using indefinite articles, you decide between "a" and "an" based on whether the next word begins with a vowel sound or a consonant sound. Importantly, this does not necessarily correspond with the letters themselves! Therefore, we say "an umbrella" but "a university", because we aren't looking at the "u" beginning the words, but rather the "uh" and "yoo" sounds that the letter represents. This also extends to abbreviations, so it's "an MO" but "a modus operandi". English spelling is messy, folks! The letter "h" is especially tricky, because different accents pronounce it to different levels, particularly when it's at the start of a word. So a Cockney might say "an ‘appy occasion", where a Minnesotan would call it a happy one.

Demonstratives

Demonstrative determiners have a similar purpose to articles in that they communicate specificity, but they come from a slightly different angle. They indicate that a) the noun is not unique, but b) it is specific, and c) I'm pointing it out right now. Unlike articles, a demonstrative determiner must refer to a noun that has been introduced recently (or that can be easily assumed, e.g. "this writing guide has been fun to write"). There are four demonstrative determiners, which could also be used as pronouns if you drop the noun they're linked to: "this" and "these" refer to things that you want to indicate a closeness to, and "that" and "those" imply more distance. The concept of distance in this situation is pretty nebulous, and highly dependent on context; as far as the grammar is concerned, "this bird" and "that bird" could well be the same bird.

The biggest thing to pay attention to with demonstrative determiners is that they can become vague very quickly, especially in the middle of a discussion where multiple nouns are involved and the determiner could conceivably refer to any of them. For example:

My book will cover subjects ranging from parts of speech to proper use of punctuation. I just need to put a bit more work into that chapter before I'm done.

What is "that chapter" about? Multiple subjects have been mentioned, and it's not clear whether "that" refers back to "parts of speech" or "proper use of punctuation", or to something else entirely.

Charlie has a lot of red marbles. He keeps them in a bag with other marbles in all sorts of colours, as well as neat rocks and shells from the beach. These treasures are his favourites, though.

Here, the ambiguity is about what is or isn't included in "these". Are we just talking about the marbles, or all of the items in the bag? Or perhaps we mean everything except the marbles?

Another contributor to vagueness is when the demonstrative determiner refers back to a noun that is too far away. If you introduce an idea in an essay and then spend a whole paragraph breaking down its effects, your reader might have forgotten what exactly you mean if you open the next paragraph with "This concept is instrumental to understanding...". In situations like these, it's much more useful to name the concept again, or to add more specificity about the concept to make it clearer what you're referencing.

Possessives

A possessive determiner is, as the name suggests, how we indicate the ownership of a noun. They are generally variants of the personal pronouns or nouns of the owner that have been adjusted to take on a possessive form:

Wait, you dropped your book! (The book is owned by "you")

Peter misses his favourite hat. (The hat is owned by Peter)

"Never Gonna Give You Up" is Rick Astley's biggest hit. (The hit is owned by Rick Astley)

The key element that makes them determiners is that these nouns and pronouns are being attached to other nouns, not functioning as their own separate nouns. When I say "your book", I'm not talking about you at all, just the book.

We also use possessive determiners to demonstrate a sense of association, not just strict ownership. Grammatically this works in exactly the same way, but the meaning is a bit different. If I talk about my grandma, for example, I'm not saying that I own her, but rather that I have a relationship to her. Similarly, I can bemoan my bus missing its stop because the stop is used by the bus, not because the bus possesses it.

Quantifiers

The final category of determiners that we will look at is the quantifier, which tell us how many or how much of the noun we're dealing with. Explicit numbers are not usually included in this category, but indicative words like "many", "no", and "some" are. Often, quantifiers can take the form of multiple words, as in "not much" or "lots of". They might also enable determiners to stack, such as "[a] [majority of] [my/those/the] oranges".

The important thing to keep in mind with quantifiers is whether you're indicating "how many of the noun" there are or "how much of the noun" there is; some quantifiers only apply to countable nouns, others only apply to non-countable nouns, and some apply to both types. A classic example of this is "less" versus "fewer": you can have less (but not fewer) water, and fewer (but not less) rubber duckies. Here are some further examples:

Todd has tried a few barbers with no luck.

Penny notices a bit of mould in several boxes of leftovers.

I have plenty of time and plenty of chocolate bars to get me through this essay.

Words that refer to individuals within a group, such as "each" or "every", can be considered quantifiers as well, but are sometimes differentiated as their own category (distributive determiners). For our purposes, I think they fit nicely into the category of quantifiers.