The Jobs Words Do

Here's a moment you'll almost certainly recognise. You're rereading an email before you send it — the one asking the landlord to fix the boiler, say, or a cover letter — and something's off. The words are all real words, the spelling's fine, but a sentence sags in the middle and you can't say why. You change one word, change it back, and finally just send the thing and hope nobody notices. Nine times out of ten that wobble is about which kind of word is doing which job, and whether it's pulling its weight. Most of us left school able to use English perfectly well but never taught what the labels were for — and the labels are exactly what let you diagnose a sagging sentence instead of staring at it.

What lives in this pillar

The parts of speech are the underlying logic of how a sentence carries meaning — the small set of jobs every word does. There are eight main classes (some grammarians split one to make nine): nouns name, verbs do or be, adjectives and adverbs describe, pronouns stand in for nouns, determiners specify or count them, prepositions show position or relationship, and conjunctions join — with the interjection carrying pure reaction (oh, ouch). This is the hub, not the lesson: it shows how the classes connect and points you to a full article on each. You already use every one of them fluently; what most of us never got was the names.

What it will — and won't — teach you

You'll see how the pieces fit together and reach the article that teaches whichever class is giving you trouble; you won't get the deep lesson on each one here — that's what the individual articles are for, and the overview of the classes is the quick tour if you want the names first. How words combine into clauses and whole sentences is the Sentence Structure pillar; how verbs behave over time — tense, aspect, the slippery -ing and -ed forms — is the Verb System; and subject–verb agreement (the team is / the team are) is Agreement. This pillar is the word-jobs themselves.

The one idea to hold onto

A word's class is the job it's doing right now, not a label it wears forever. Run is a verb in "I run," a noun in "I went for a run." Light the candle (verb), turn on the light (noun), a light jacket (adjective) — one word, three jobs. So don't memorise "run is a verb"; ask what the word is doing in this exact sentence, and its class falls straight out. That single shift — from the word to its job — is worth more than any amount of memorised definitions, because it works on words you've never consciously classified before, and it's what turns the labels from a memory test into an editing tool. That whole technique — the desk tests, the traps, the editing payoff — is the subject of how to spot word classes and use them to edit.

Where to start

Each word-job has its own article. A sensible order builds outward from nouns, but start wherever the confusion is.

The content core — the words carrying the meaning:

• Nouns — the naming words, and the place to start, since so much of a sentence attaches to them.
• Verbs — the doing-or-being word every proper sentence has to have.
• Adjectives — the describing words that tell you which or what kind.
• Adverbs — mostly the how / when / where words; many end in -ly, not all.

The structural glue — the words that point, replace and join:

• Determiners — the, a, this, my, three: they specify or count a noun.
• Pronouns — the stand-ins (he, she, they) that save you repeating a name.
• Prepositions — in, on, before, with: relationships in space and time.
• Conjunctions — and, but, because, so: the joiners.
• Interjections — oh, ouch, hmm: pure reaction, no grammatical work.

And when you want the technique rather than any single class — the desk tests, the slippery shapes, using labels to edit — go to How to Spot Word Classes and Use Them to Edit.

UK vs US: what actually changes here

The parts of speech are identical in British and American English — a noun is a noun everywhere. The only differences are cosmetic: the spelling of example words (colour [US: color], organise [US: organize]) and a few names (full stop / period). The one thing that looks like a word-class difference — collective nouns taking a plural verb more readily in the UK (the team are meeting) — is really an agreement question, not a class one.

How this connects to the rest of the library

Word classes are the raw material; the neighbouring pillars put them to work. Once you can name the parts, Sentence Structure shows how they combine into clauses and sentences; the Verb System handles how the verb behaves over time; Agreement keeps subjects and verbs matched; and where a mark rather than a word is the trouble, that's Punctuation. Most editing questions start by asking which kind of word — or which pillar — the problem really belongs to.

Your first step

If you just want the lay of the land, open the overview of the classes and skim the eight jobs. If a particular word-job keeps tripping you — a stray adverb, a wrong pronoun — go straight to its article above. And if the real skill you're after is editing with this — spotting the weak verb or the bloated noun phrase — start with How to Spot Word Classes and Use Them to Edit.