Using “A” and “An”

I’ve already told you about the use of “the”. “The” is tricky— a single word with six rules of use. I’m happy to tell you that using “an” and “a” is simpler. There are just three rules for using these two words.


Rule 1:

Use “a” and “an” only before singular nouns. Plural nouns and non-count nouns will have no article. (And of course, any noun can have “a” in certain situations.)


I have parents and a child of my own. (Only “child” has the article “a,” because “parents” is plural.)

The man has an ugly nose, brown eyes, and red hair. (Only “ugly nose” is modified with “an.” “Man” describes a specific man and is modified by “the”. “Brown eyes” contains a plural noun and has no article. “Hair” also has no article, because it is non-count.)


Rule 2: “A” is used before a word that begins with a consonant. “An” is used before a word that begins with a vowel.


An animal walked across the road.

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A large animal walked across the road.

An awfully large animal walked across the road.

A monkey and an owl ate an apple and a banana.

  • Exception 1: If the word after an article is a letter or initial, use “a” or “an” based on the sound the letter or first initial makes when you say it out loud.

Exception 1 examples:

He is a U.S. citizen. (The name of the letter “U” is pronounced “yoo,” beginning with the consonant sound of “y.”)

I got an F on my exam. (The name of the letter “F” is pronounced “eff,” beginning with a short “e” sound.)

  • Exception 2: The vowel “U” can sometimes have the “Y” consonant sound at the beginning of words. When this happens, use “a” instead of “an” before the word.

Exception 2 examples:

I am taking university classes.

Modern Germany is a united country.

  • Exception 3: If a word begins with an “h” and the first syllable is unstressed, you can use either “a” or “an.” Make sure you are consistent, though! In your writing, put “an” before all of your words that start with an “h” and an unstressed syllable. Or put “a” before all of your unstressed “h” syllable words. If you use “a” sometimes and “an” other times, your writing can seem a little confusing.

Exception 3 examples:

  The election of America’s first African American president was an historic event. OR The election of America’s first African American president was a historic event.

An hyena ate a hamburger. OR A hyena ate a hamburger. (Note that the first syllable of “hyena” is unstressed, while the first syllable of “hamburger” is stressed. Because of this, hamburger can only come after “a.”)


Rule 3: For numbers, fractions, money, measurement or time periods that begin with “one,” you can use “a” or “an” instead of “one.”


The temperature is a hundred degrees. OR The temperature is one hundred degrees.

I ate a third of the cake. OR I ate one third of the cake.

That costs a dollar. OR That costs one dollar.

An ounce of feathers weighs as much as an ounce of rocks. OR One ounce of feathers weighs as much as one ounce of rocks.

A cheetah can run a mile in about a minute. OR A cheetah can run one mile in about one minute.

Although Rule 2 has a few exceptions related to phonics, I think these rules are pretty straightforward. Hopefully you will find the rules of “a” and “an” easy to remember once you study and practice them.


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  • David Recine

    David is a Test Prep Expert for Magoosh TOEFL and IELTS. Additionally, he's helped students with TOEIC, PET, FCE, BULATS, Eiken, SAT, ACT, GRE, and GMAT. David has a BS from the University of Wisconsin-Eau Claire and an MA from the University of Wisconsin-River Falls. His work at Magoosh has been cited in many scholarly articles, his Master's Thesis is featured on the Reading with Pictures website, and he's presented at the WITESOL (link to PDF) and NAFSA conferences. David has taught K-12 ESL in South Korea as well as undergraduate English and MBA-level business English at American universities. He has also trained English teachers in America, Italy, and Peru. Come join David and the Magoosh team on Youtube, Facebook, and Instagram, or connect with him via LinkedIn!

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2 Responses to Using “A” and “An”

  1. anu October 19, 2014 at 6:35 am #

    I have difficulty in understanding newspapers and especially the editorial page.

    First I don’t have any background for most of the international and political news and they are so boring.
    I have tried my hands at understanding them but I keep on forgetting the meaning .I struggle with punctuation marks and vocabulary .

    I am a non native English speaker so I think in my language first and then translate it in my mind .
    I have to think over and over again regarding correctness of my writing . Please help me out guys. Thanks a lot!

  2. David Recine November 2, 2014 at 7:03 am #


    Sorry for my delayed response. I’ve been travelling to academic conferences and haven’t had much Internet access. But you’ve asked some very good questions.

    For practice reading news in English, I especially recommend this website: .

    News In Levels allows you to read the same news story, written at beginner, intermediate, and advanced levels.

    To try to make politics more interesting, check out Jeffrey Hill’s English Blog— Mr. Hill posts cartoons and videos related to news and politics, and helps explain the meaning of it all:

    As for writing, it’s actually very good to think and rethink the correctness of what you’ve written— native speakers should do this too. With enough writing practice, you can get a little faster at this. Try keeping an English language writing journal every day, if you aren’t doing that already.

Magoosh blog comment policy: To create the best experience for our readers, we will only approve comments that are relevant to the article, general enough to be helpful to other students, concise, and well-written! 😄 Due to the high volume of comments across all of our blogs, we cannot promise that all comments will receive responses from our instructors.

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