A and An (Indefinite Article)
A/An : Used for singular count nouns The : The second time you refer to the same person or thing A : Consonant Sound, example: (U) A University An : Vowel Sound, example: (H) An Hour A/An : To describe someone/something with an adjective and a noun or a noun and a qualifier, example: A Worried man A/An : Not omit infront of a noun when the noun refers to someone’s profession/job, example: An Artist