1. The two indefinite articles in English are a and an. The indefinite article an is used to make pronunciation easier when reading a text aloud. The general rule is to use a when the indefinite article precedes a word beginning with a consonant sound and an when it precedes a word starting with a vowel sound.
2. Indefinite Articles: A and An
3. How to Use the Indefinite Articles A vs. An
4. The article A is used before singular, countable nouns which begin with consonant sounds.
4.1. EXAMPLES:
5. He is a teacher.
6. She doesn't own a car.
7. I saw a bear at the zoo.
8. 1 Use a when the indefinite article comes before a word beginning with a consonant sound: a toy a book a house 2 Use an when the indefinite article comes before a word beginning with a vowel sound:
9. The article AN is used before singular, countable nouns which begin with vowel sounds.