To keep it simple, you use an when the first letter of the next word sounds like a vowel when pronounced (vowel sound) and appplies to ancronyms too. Otherwise you use a.
Counting the number of syllables in a language like Danish means you just count the number of vowels. A syllable must have one, and only one, vowel. A word like "you", if it existed in Danish, would have three syllables, because all those letters are vowels, at any point in time.
When you pronounce the M from MBA, you hear the e in front, you’re saying em-bi-a. But for mechanic, you just have a stromg m.
This is what I mean by “if it sounds like a vowel”. And hence an and a.
An "ess queue ell", but a "sequel".
:(
Mostly breaks concentration/focus etc.
Like in this context, do we always treat Y when pronounced like "Yes" or "Yogurt" as a consonant?
English has this thing where you know you wrote or pronounced something correct if it sounds right.