The use of "a" or "an" depends on the sound that follows it, not the spelling of the word. Use "a" before words that begin with a consonant sound: a car a house a book Use "an" before words that begin with a vowel sound: an apple an hour an umbrella Remember, it's about the sound, not just the letter. For example, "hour" starts with an 'h', a consonant, but it's silent, so we use "an" before it. #englishgrammar #englishgrammartips #englishgrammarinuse #englishgrammarrules #englishgrammarlesson #