Capitalising the First Word of a Sentence

This is the most important capital-letter rule of all, and the good news is it never changes: every sentence begins with a capital letter. Master this one and half of capitalisation is already sorted.

Why this one trips people up

Here is the strange thing. Almost everyone knows this rule, yet it is still one of the most-circled mistakes in exercise books across the country. Why? Because when you talk, there is no capital letter to forget. Words simply run out of your mouth in a stream, and your voice does the job of showing where one thought stops and the next begins. On the page there is no voice, so the capital letter has to do that job instead. When you are writing fast, or copying something from your head, it is desperately easy to let the stream keep flowing and miss the little lift at the start of a new sentence. That is not a sign you are bad at English. It is a sign your writing hand is going faster than your writing brain. Slow the hand down at the full stops, and the problem mostly disappears.

The rule

Start of a sentence, capital letter. Always.

The dog barked. We ran outside. It was only the postman.

How do you know a new sentence has started? Look at the mark before it. A full stop (.), a question mark (?) or an exclamation mark (!) ends a sentence, so the very next word gets a capital.

It rained all day**. We stayed in. Was it boring? N**ot at all!

Notice that it does not matter what the next word is. Even a small, ordinary word like the, and, but or so stands up tall when it opens a sentence. The capital is not about the word being important. It is about the position the word has landed in.

A second test: read it aloud

Here is a quick trick for when you are not sure whether one sentence has really finished. Read the line aloud and listen to your voice. At the end of a real sentence your voice drops and you take a proper pause, the kind where you could take a breath. That drop is the sound of a full stop. The very next word after it needs a capital. If your voice only dips a little and keeps going, you have probably reached a comma instead, and no new capital is needed. Your ear already knows more about sentences than you think.

Watch out, a comma is not a full stop

A comma does not end a sentence, so the word after it stays lowercase:

• Wrong: After lunch, We played football. Right: After lunch, we played football.
• Wrong: It was late, So we went home. Right: It was late, so we went home.

Only full stops, question marks and exclamation marks start a new sentence. Commas just take a little breath in the middle.

The tricky edge: names always keep their capital

There is one more thing to hold onto, because it catches people out. Some words carry a capital letter wherever they sit in a sentence, not because they start it, but because they are names. London, Monday, Priya, December all keep their capital in the middle of a line:

We met Priya on Monday in London.

So a sentence can have several capitals: one at the very start because it is the start, and others in the middle because those words are names. Do not let a mid-sentence capital confuse you, and do not "fix" it by making it lowercase. If the word is somebody's name, a place, a day or a month, it earns its capital on its own.

One-word answers count too

Sometimes a "sentence" is only one word long, and it still gets a capital. Think of a short reply in a story or a bit of dialogue: Yes. Never. Stop! Each of those stands on its own as a complete little answer, so it opens with a capital just like any other sentence. The same is true of short exclamations, Help!, Brilliant!, Sorry. You do not need lots of words to make a sentence; you need a complete thought that could stand alone. If a group of words, or even a single word, is doing that job on its own, give it a capital at the front. This is worth remembering because these short lines are exactly the places where a quick writer forgets, dropping a lowercase yes or stop into the middle of a lively bit of writing.

Why it matters

You might wonder whether one missed capital really matters. On its own, no, nobody's world ends. But capitals are like the white lines painted on a road: each one is small, yet together they tell the reader exactly where they are going. A page of writing where sentences never lift their first letter is exhausting to read, a bit like listening to someone who never pauses for breath. Worse, in an exam the person marking your work is actively looking for these small signals of care. Getting your sentence capitals right is one of the cheapest, easiest ways to make your writing look controlled and grown-up, and it costs you nothing but a moment's attention at each full stop.

Quick check

Add the missing capitals:

1. the bell rang. everyone cheered.
2. are we there yet? not quite.
3. when it stopped, we went outside.
4. my friend tom lives in leeds. we visited him in august.
5. it was raining, so we stayed in.
6. stop! that is dangerous.

Answers

1. The bell rang. Everyone cheered.
2. Are we there yet? Not quite.
3. When it stopped, we went outside. (only one capital, "we" follows a comma)
4. My friend Tom lives in Leeds. We visited him in August. (sentence starts, plus the name, place and month)
5. It was raining, so we stayed in. (only one capital, "so" follows a comma)
6. Stop! That is dangerous. (the exclamation mark ends a sentence, so a new capital follows)

Where next

• Proper Nouns: The Capital-Letter Core Rule — the other big reason words get a capital: names.
• The Over-Capitalisation Trap — why NOT to capitalise ordinary words.
• Getting "I", Days and Acronyms Right — the always-capital word I and other special cases.