ThirdQED answered Monday November 16 2009, 6:42 am: "A year" is correct.
--When the letter "y" is the first letter of a syllable that has more than one letter, it is treated as a consonant (other than that, it is always a vowel).
"A unique" is correct.
--When the letter "u" makes the same sound as the letter "y," it is treated as y. (But then if the "u" sounds like a vowel, then use "an" [for example, "an understanding].)
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A few other weird ones? Hmm, let's see:
"A one-round match"
--When the letter "o" makes the same sound as the letter "w," it is treated as w ("w^n").
"An hour"
--When the letter "h" is not sounded (mute), which makes the word sounds like it starts with a vowel, use "an."
"An X-ray"
--When the word starts with a vowel sound, use "an," even if it starts with a consonant (in this case, it sounds like "ex-ray").
--This is perhaps the most complicated one. For example, you would say "an MRI" because the first sound that the word makes sounded like a vowel (em-ar-eye). But then if you were to write it out--Magnetic Resonance Imaging--you would use "a" instead ("a magnetic resonance imaging").
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