An or a before a word beginning with a vowel.

Question

Is there a rule for using both a and an before a word beginning with a vowel? E.g. I know it's correct to say, "a usual day at an unusual school", but as both words begin with a vowel, this is where it becomes a little problematic for me.

Thanks in advance.

Clive · Accepted Answer

Hi,

Is there a rule for using both a and an before a word beginning with a vowel? E.g. I know it's correct to say, "a usual day at an unusual school", but as both words begin with a vowel, this is where it becomes a little problematic for me.

It's not based on whether the word starts with a vowel letter. It's whether it starts with a vowel sound when you say it.

unusual - starts with a vowel sound (UHN)

usual - starts with a Y sound, (like YES)

Clive

Ellycat · Answer

Thanks once again, Clive. So by the same rule of thumb, 'a house' and 'an hour' are both correct?

Clive · Answer

Hi,

Yes.

Clive

Masashi Ng · Answer

Whether we use the indefinite articles "a" or "an", it depends on the beginning letter. If the word begins with a consonant spelling/sound, we use the article "a" and if the word begins with a vowel spelling/sound, we use the article "an". There are 26 letters in the English alphabet, and 5 letters are vowel, which is A, E, I, O, and U and the other 21 letters are consonants, which is the rest of the letters.
"A" Article with Consonants Brief Examples:
A book, A car, A dog, A frog, A lemon, A truck
"An" Article with Vowels Brief Examples:
An apple, An egg, An insect, An orange, An umbrella, An actor
However, there are some rule-breaker exceptions, especially in which the beginning sound might be irregular with vowels and consonants spellings and sounds.
Firstly, we say "a house" but we say "an hour", not "a hour". That's because although H is a consonant but in "hour", the beginning H is silent and it sounds like it starts with an O, which is a vowel sound, so we use the article "an" for "hour". If the word begins with a silent H, then we use the article "an" because it sounds like it begins with a vowel. There are a few words that begins with a silent H, which includes:
hour, honest, honor, heir
Secondly, we say "an uncle", but we say "a utensil", not "an utensil". That's because although U is a vowel but in "utensil", the beginning U is a long U and it sound like "you", which sounds like it starts with a Y, which is a consonant sound, so we use the article "a" for "utensil". If the word begins with a long U, then we use the article "a" because it sounds like it begins with a Y, which is a vowel sound. There are some words that begins with a long U, which includes:
use, unit, unicorn, unique, universe, university, uniform, unicycle, utensil, usual, ukulele
Thirdly, Y is generally a consonant, but it can sometimes behave like a vowel, so Y is considered as a semi-vowel. When Y begins a word or a certain syllable, then it's a consonant. When Y is through a certain syllable or if it ends a certain syllable or word, then it's a vowel. Although Y begins a word or a certain syllable, the following letter is also an important factor to whether it's a consonant or vowel. If the following letter is a vowel like yellow, yard, yarn, yearn, yes, year, yeast, etc., then it's a consonant. However, if the following letter is a consonant like yttrium, ytterbium, etc., then Y is a vowel although it begins a word or a certain syllable. In this case, we say "a yard, a yarn, a year, a yeast", but we say "an yttrium, an ytterbium", not "a yttrium, a ytterbium". That's because although Y is a vowel, but in "yttrium, ytterbium", the beginning Y is a vowel due to the following consonant and it sounds like it begins with an I, which is a vowel sound, so we use the article "an" for "yttrium, ytterbium". If the word begins with a vowel Y, especially when the following letter is a consonant, we use the article "an" because it sounds like it begins with a vowel.
If the word begins with a consonant spelling but with a vowel sound, we use the article "an" and if the word begins with a vowel spelling but with a consonant sound, we use the article "a".
Technically, whether to use the indefinite articles "a" or "an", it depends more directly on their sound rather than their real spelling. The indefinite articles might also depend on their real spelling, but quite indirectly.

An or a before a word beginning with a vowel.

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