THE ARTICLES A/AN

1. An ID

2. I have a dollar.

3. A is used when the next word begins with a consonant sound.

4. We use these articles with singular nouns and the first time we refer to a person, animal or thing.

5. A clock

6. We use ONE (or more) instead of A/AN when the number is important.

7. We don't use A/AN with possessive pronouns, demonstratives or cardinal numbers

8. There is only one camera in my room.

9. AN is used when the next word begins with a vowel sound

10. I want an agenda

11. This book is interesting