Inactive Tutor answered 05/18/17
Tutor
New to Wyzant
Use "a" (indefinite article) when referring to general nouns that begins with constanants.
ex: a bar , a chair, a snake
Use "an" (indefinite article) when referring to general nouns that begin with a vowel.
ex: an apple, an octagon, an igloo
Use "the" (definite article) when referring to specific or unique nouns.