Use A And An
A vs. An: When to Use Indefinite Articles | Merriam-Webster
The rule that many people vaguely remember is that one uses a if the word that follows it begins with a consonant, and one uses an if the following word begins with a vowel. That would be so easy, wouldn’t it? It would, which is why that is not the way that the rule for using a or an works. It's About the Sound
https://www.merriam-webster.com/words-at-play/is-it-a-or-an
"A" vs. "An" - When to Use - grammar
If the word begins with a vowel sound, you must use an. If it begins with a consonant sound, you must use a. For example, the word hour begins with the consonant h. But the h is silent, so the word has a vowel sound. Hence: an hour The rule works the other way as well. Take the word university. It begins with the vowel u.
https://www.grammar.com/a-vs-an-when-to-use/
3 Ways to Use "A" and "An" Correctly - wikiHow
Normally (when you'd use "a"), pronounce it as "umbrella". But when you'd use "an", you should pronounce it as "thee" (like "me"). "A" and "An" are indefinite articles, meaning they don't refer to a particular or special word. If you need something to get you to work, but any old car will do, you would say "I need a car."
https://www.wikihow.com/Use-%22A%22-and-%22An%22-Correctly
When To Use "A" vs. "An" | Thesaurus.com
The rule is: Use an before a word beginning with a vowel sound (not letter). It doesn’t matter how the word is spelled. It just matters how it is pronounced. Use a before a word with a consonant sound as well as y and w sounds. Which means it is not unusual to find a before a word starting with a vowel or an before a word starting with a consonant.
https://www.thesaurus.com/e/grammar/a-vs-an/
Indefinite Articles: A and An | Grammarly
The two indefinite articles in English are a and an. The indefinite article an is used to make pronunciation easier when reading a text aloud. The general rule is to use a when the indefinite article precedes a word beginning with a consonant sound and an when it precedes a word starting with a vowel sound. 1 Use a when the indefinite article ...
https://www.grammarly.com/blog/indefinite-articles-a-and-an/
"A" and "AN" - How to use? - grammar
The general rule is that, “an” is to be used before a vowel and “a” is to be Used before a consonant. This rule is applicable in most of the situations. But in some cases the word “an” is used before consonant and at the same time the word “a” is used before a vowel. Because, the actual usage of "a" and "an" in English is not related to whether,
https://www.grammar.com/a_and_an_how_to_use
A vs. An: When to Use A or An in a Sentence - Writing Explained
An is used before words, abbreviations, acronyms, or letters that begin with a vowel sound, regardless of their spelling. An idiot. An element. An honor. An heirloom. The rule only becomes tricky when you have a vowel with a consonant sound or a consonant with a vowel sound like in our above examples, A university (yoo-ne-ver-se-tee).
https://writingexplained.org/a-vs-an-difference
An or A? - Grammar Monster
(The words "an" and "a" are known as articles .) The sound of a word's first letter determines whether to use "an" or "a." If the word starts with a vowel sound, you should use "an." If it starts with a consonant sound, you should use "a." For example: Buy a house in an hour.
https://www.grammar-monster.com/lessons/an_or_a.htm
A or An? Rules and Exceptions for Using Indefinite Articles
When the next word begins with a consonant sound, you use a. You can tell when to use an instead of a if the next sound is a vowel sound. A misunderstanding of the rule is that you need to pay attention to the actual letter of the next word. In reality, it’s the sound of the word that you should follow when deciding to use a or an.
https://grammar.yourdictionary.com/vs/a-vs-an-basic-rules-and-exceptions.html
How to Use Articles (a/an/the) // Purdue Writing Lab
The is used to refer to specific or particular nouns; a/an is used to modify non-specific or non-particular nouns. We call the the definite article and a/an the indefinite article. the = definite article a/an = indefinite article For example, if I say, "Let's read the book," I mean a specific book.
https://owl.purdue.edu/owl/general_writing/grammar/using_articles.html
A, An, & And: How to Choose the Right Word - ThoughtCo
" A" and "an" are indefinite articles that precede nouns or the adjectives modifying nouns. In English grammar, "a" and "an" are determiners, meaning they specify the identity or quantity of something, and for both words, that quantity is "one"—the word from which they're derived.
https://www.thoughtco.com/a-an-and-1692639