10 Simple English Grammar Rules 2. Use of Articles (a, an, the): - "A" is used before words that begin with a consonant sound, and "an" is used before words that begin with a vowel sound. "The" is used to refer to a specific item or items. Professional English Teacher 😀 No Grammar. 🗣️ Relaxed conversation. 💡Learn English efficiently. https://www.italki.com/en/teacher/1605872