모음으로 시작하는 단어 앞에 쓰여 정해지지 않은 하나를 나타내는 부정관사
The form of the indefinite article used before words beginning with a vowel sound, referring to a single person or thing.
예문:
"I found an old photograph in the attic."
"She is an expert in international law."
"An orange is rich in vitamin C."
단위를 나타내는 단어 앞에 쓰여 비율이나 빈도를 나타내는 말
Used to indicate a rate or frequency; equivalent to 'per' or 'for each'.
예문:
"The car can reach 100 miles an hour."
"He charges fifty dollars an hour for tutoring."
말하는 이가 잘 모르는 사람의 이름 앞에 붙여 쓰는 말
Used before a proper noun to refer to a person who is unknown to the speaker.
예문:
"An Arthur Pringle is waiting in the lobby."
"I received a letter from an Elizabeth Smith."