1.1. The indefinite article precedes a singular noun, whether individual or collective .
2. structure
2.1. The article "A" precedea a noun that begins with consonant sound
2.2. The indefinite article "An " is used before nouns beginning with a vowel sound . In the vast majority of cases of cases , this initial sound corresponds to a vowel.
3. Examples with "A"
3.1. a building a port A thought a community a pain a light a plate
4. Examples with "An"
4.1. an orange an island an ice cream an orchestra an effort an ape
