The Rule is Not "A" Before Consonants and "An" Before Vowels (Grammar Rules)

Do you put "a" before consonants and "an" before vowels? Many people get this rule wrong, including some of the most grammatically sound people I know. The real rule is this.
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Many people adhere to a belief that you use the article "a" before words that begin with consonants and "an" before words that begin with vowels. But that isn't the rule, and it's important to avoid this rookie mistake before turning over your manuscript to agents and editors.

(Grammar rules for writers.)

The real rule is this: You use the article "a" before words that start with a consonant sound and "an" before words that start with a vowel sound. For example, He has a unique point of view on the subject and talked about it for an hour. The "u" in "unique" makes the "Y" sound—a consonant sound—therefore you use "a" as your article, while the "h" in "hour" sounds like it starts with "ow"—a vowel sound.

Make sense?

The Rule Is Not "A" Before Consonants and "An" Before Vowels | Grammar Rules

Here are a few examples:

Correct: I need an hour to complete that task.
Incorrect: I need a hour to complete that task.

Correct: This is a universal technique.
Incorrect: This is an universal technique.

Of course, "a" goes before words that begin with a consonant if they have that consonant sound, just as "an" goes before words that begin with a vowel if they have that vowel sound. In a way, this is a poetic rule, because it's all about sound.

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