Put a ❤️ before you read this "A" and "an" are used with singular nouns to refer to something that is not specific or known. They refer to something general, such as a book, an apple, or a student. "A" is used before words that begin with a consonant sound (b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, y, z). For example: a book, a city, a game. "An" is used before words that begin with a vowel sound (a, e, i, o, u). For example: an apple, an opinion, an hour. Here are some exceptions 1. A university (not "an university") "University" starts with a "yu" sound, which is a consonant sound, so we use "a." 2. An hour (not "a hour") "Hour" starts with a silent "h" and the vowel sound "ow," so we use "an." 3. An honest person "Honest" starts with a silent "h," vowel sound. This took me too much time to write for you. Put a ❤️ for this effort.