English · A1 · grammar · 4 minutes
A, an, and the
Choose an indefinite article by sound and the definite article by shared identity.
Understand the choice
Articles express countability and shared context, not noun gender. A university begins with consonant sound /j/; an hour begins with vowel sound because h is silent.
Core rule: Use a/an for one nonspecific singular count noun; choose an before a vowel sound. Use the when the listener can identify the noun.
Notice it in context
A student opens an umbrella near the door.
Un estudiante abre un paraguas cerca de la puerta.
A student has consonant sound; an umbrella vowel sound; the door is identifiable in context.
She is a doctor at a hospital.
Her profession is doctor; she works at one unspecified hospital.
A appears before two consonant sounds.
The apple is on an old table.
The known apple is on one old table.
The marks known apple; an precedes vowel sound old.
What to remember
- Plural and uncountable general nouns often use zero article: books are useful; water is essential.
- Article choice follows sound, not spelling.
Common trap: Do not write an university or a hour.