Using a and an
- Use a before a word that begins with a consonant sound: a book, a car.
- Use an before a word that begins with a vowel sound: an apple, an egg.
Key idea
Use 'a' before a consonant sound (a book) and 'an' before a vowel sound (an apple).
Remember
'an' is used before vowel sounds a, e, i, o, u.