Use Of The A And An Questions Medium
Yes, you can use "a" before a vowel sound. The choice between using "a" or "an" depends on the sound that follows the article, not necessarily the letter itself. "A" is used before words that begin with a consonant sound, while "an" is used before words that begin with a vowel sound. For example, you would say "a university" because the "u" in "university" is pronounced as a consonant sound (/juː/), while you would say "an hour" because the "h" in "hour" is silent, and the word begins with a vowel sound (/aʊər/).