Articles: a / an / the
Indefinite and definite articles.
English has two kinds of articles. The indefinite articles — a and an — are used when we talk about one thing that is not specific, or when we mention something for the first time. We use a before words that begin with a consonant sound (a book, a dog, a university — 'university' starts with the /j/ sound, which is a consonant sound). We use an before words that begin with a vowel sound (an apple, an egg, an hour — 'hour' starts with a silent 'h', so the first sound is a vowel /aʊ/). The definite article the is used when both the speaker and the listener know which thing we are talking about — it may already be mentioned, or there is only one of it (the sun, the teacher in our class). We use no article (sometimes written as —) when we talk about things in general using a plural noun (Dogs are friendly. Books are useful.). For example: I have a cat. The cat is black and white.
Key terms
| Article | Use before | Examples |
|---|---|---|
| a | consonant sound | a book, a dog, a cat, a teacher, a uniform (sounds like 'you-') |
| an | vowel sound | an apple, an egg, an orange, an umbrella, an hour (silent h), an honest girl (silent h) |
Tip: Listen to the SOUND of the first letter, not the letter itself. 'Hour' starts with a vowel sound /aʊ/, so we say 'an hour'. 'Uniform' starts with /j/ (a consonant sound), so we say 'a uniform'.
| Article | When to use | Example |
|---|---|---|
| a / an | First mention of a singular noun (non-specific) | I have a cat. |
| the | Second mention — listener now knows which one | The cat is black. |
| the | Only one of this thing exists (unique) | the sun, the moon, the sky |
| the | Specific noun, location makes it clear which one | Open the window. Look at the bird on the roof! |
| the | Musical instruments after 'play' | She plays the piano. Can you play the guitar? |
| — | Plural noun in a general statement | Dogs are friendly. Flowers are beautiful. |
| — | Uncountable noun in a general statement | We have homework. My mum buys bread. |
For a second mention, always switch from 'a/an' to 'the': I see a dog → The dog is brown.
| Word | First sound | Correct article |
|---|---|---|
| hour | /aʊ/ — vowel (silent h) | an hour |
| honest | /ɒ/ — vowel (silent h) | an honest girl |
| umbrella | /ʌ/ — vowel | an umbrella |
| uncle | /ʌ/ — vowel | an uncle |
| uniform | /j/ — consonant (sounds like 'you') | a uniform |
| university | /j/ — consonant (sounds like 'you') | a university |
| European | /j/ — consonant (sounds like 'you') | a European doctor |
Always say the word aloud. If the first SOUND is a vowel, use 'an'. If it is a consonant, use 'a'.
- 1Step 1: Find the noun (or adjective before it): We want to say: 'She is ___ honest girl.'
- 2Step 2: Say the first word aloud: 'Honest' — the 'h' is silent. The first sound we hear is /ɒ/ — a vowel sound.
- 3Step 3: Choose the article: Vowel sound → use 'an'.
- 4Result: She is an honest girl. ✓
- 1Step 1: First mention — non-specific: I can see a big house. ('big house' is new information → use 'a')
- 2Step 2: Second mention — now specific: The house has a red door. (listener already knows which house → use 'the')
- 3Note: Every time you introduce something new, use 'a' or 'an'. The next time you say it, use 'the'.
Do NOT say 'a apple', 'a egg', or 'a orange'. Apple, egg, and orange all start with vowel sounds, so use 'an': an apple, an egg, an orange.
Do NOT say 'an banana' or 'an book'. Banana (/b/) and book (/b/) start with consonant sounds, so use 'a': a banana, a book.
Do NOT say 'a university' is wrong — actually 'a university' IS correct! 'University' sounds like 'you-niversity' (/j/ sound), which is a consonant. Write 'a university', NOT 'an university'.
Watch out for silent 'h' words: 'hour' and 'honest' start with a vowel sound because the 'h' is not pronounced. Always say 'an hour' and 'an honest person'.
Use 'the' with musical instruments after 'play': play the guitar, play the piano. Do NOT say 'play a piano'.
Rules
- 1Use a before a word that begins with a consonant sound: a book, a cat, a university.
- 2Use an before a word that begins with a vowel sound: an apple, an orange, an hour.
- 3Use the when both speaker and listener know exactly which thing is meant: the sun, the teacher.
- 4Use the when something is mentioned a second time: I have a dog. The dog is brown.
- 5Use no article (—) with plural nouns when speaking about things in general: Dogs are animals.
Practice
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