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Possible Duplicate:
“A historic…” or “An historic…”?

Should an be used before words beginning with 'h'? What about when the 'h' is silent and is followed by a vowel?

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marked as duplicate by nohat Jan 11 '11 at 2:21

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.

Duplicate of english.stackexchange.com/questions/629/… ? – Steve Melnikoff Jan 10 '11 at 23:55
@nohat: Thanks for closing. If it's within your moderator powers, please merge the answers as well. – ShreevatsaR Jan 11 '11 at 12:17
I don't think we should merge questions though, b/c I would have never found the question under the other title. – C. Ross Jan 11 '11 at 13:07

A rule of thumb is to use "an" only when you do not hear the h when you pronounce the word. See here: "A historic..." or "An historic..."?

A summary:

  • If the h is silent, as in "hour", use "an".
  • If the h is sounded and the first syllable is stressed, as in "hammer", we use "a".
  • If the h is normally sounded but the first syllable is not stressed, it could be either "a" or "an", depending on the noun and the speaker. I think you will hear "an historical building" more than "an harpoon". Words in this category may be pronounced differently by different people in different places. According to our esteemed moderator Nohat, traditionalists would use "an" in this case (see the link above).
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We should not when it is not silent. We say "a human" and not "an human".

However, we use 'an' when h is silent. E.g We say 'an hour' but not 'a hour'.

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