Articles A and AN

1. exceptions

1.1. Honest

1.2. Honored

2. use of "A"

2.1. used to indicate membership of a class of people or things.

2.2. Example

2.2.1. A Cat

3. Use of "An"

3.1. used before words beginning with a vowel sound.

3.1.1. Example

3.1.1.1. An Apple

4. sentences using "An"

4.1. An Elephant

5. Sentences using "A"

5.1. A Doctor

6. Video

7. usar a/ an