louiST normally we use "an" if the first letter is a vowel (a, e, i, o, u) and for the rest "a" Not exactly. We use "an" if the first SOUND in the next word is a vowel sound ; otherwise we use "a". You cannot know whether to use "an" or "a" without pronouncing the word.
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louiSTnormally we use "an" if the first letter is a vowel (a, e, i, o, u) and for the rest "a"Not exactly. We use "an" if the first SOUND in the next word is a vowel sound; otherwise we use "a". You cannot know whether to use "an" or "a" without pronouncing the word. Just looking at the letters won't help.