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Possible Duplicates:
“A user” or “an user”?
Use of “a” versus “an”

If I remember correctly back to my school days, the rule is to use "a" if the next word starts with a consonant, or "an" if the next word is a vowel.

For example:

  • This is a banana.
  • This is an egg.

If the above is correct, then why does this sentence sound wrong...?

  • The account requires an username.
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marked as duplicate by Alenanno, Steve Melnikoff, RegDwigнt May 6 '11 at 10:32

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

I tried to add a consonant tag, but their isn't one and I don't have enough rep! – BG100 May 6 '11 at 9:56
Possible duplicates: A user or AN user,Use of A versus AN, When to correctly use AN and A Read the first question I linked, it's the exact duplicate of yours. :) – Alenanno May 6 '11 at 10:00
@Alenanno: I searched the site for keywords A and AN, but it didn't return anything!! Not sure why, but thanks for the link. – BG100 May 6 '11 at 10:03
No problem! – Alenanno May 6 '11 at 10:04
the site search doesn't really work for such short and general words. Entirely not your fault. What I can recommend instead is having a look at the "faq" tab under "Questions" (where 3 out of the top 5 questions deal with a vs an), or googling using the "site:" operator. – RegDwigнt May 6 '11 at 10:37
up vote 3 down vote accepted

When a word begins with a u, sometimes it a acquires what linguists call a "y-glide": a pronunciation that makes it sound like it begins with a "y":

  • user (yoozer)
  • uniform (yooniform)
  • ubiquitous (yoobiquitous)

And so on.

Now think of words you pronounce that begin with "y": a youth, a yew — you wouldn't say "an youth" or "an yew".

So we say "a user" but "an understanding" — just that simple.

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