articles a/an

1. Is used "a" when the word begins with a consonant

1.1. A dog

2. Is "AN" because the word comiensa with vowel

2.1. AN elephant

3. "a" should be used when the word that follows begins with consonant sound.

3.1. I was reading a book

4. I have a heart

4.1. "a" should be used when the word that follows begins with consonant sound.

5. The article is used in front of the words Beginning with Vocal

5.1. an orange