We try to share advice with our readers so they can avoid common mistakes we see in documents our clients send us. Rather than sit back and contribute to the erosion of established rules and standards, we're here to reinforce what leading English grammar authorities consider to be proper, and help our readers avoid what those authorities consider to be wrong. To that end, we detail here some mistakes we often see in our clients' documents, and their corrections.
A & AN: Vile errors
Guideline. Use a before any word that begins with a consonant sound. Use an before any word that begins with a vowel sound. Easy enough. We'll dispense with the obvious examples and go right to the ones we see missed every day: sounds that begin with consonants but are pronounced as though they start with vowels - and vice versa.