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Indefinite Article – A and An

Learning English with The AN and freSy

What is an Indefinite Article? Have you heard about indefinite Articles? In this article, we will get to know about the indefinite article, Phrase, Its rules, usage, and practice questions. As we all know there are three articles in English: a, an, and the. Articles are a form of an adjective used before nouns or noun equivalents. Using the definite article (the) before a noun indicates that the reader knows the noun’s identity.

Before a noun that is general or whose identity is unknown, the indefinite article (a, an) is used. There are instances in which a noun does not require an article. We use the indefinite article a/an with singular nouns when it is unclear to the listener/reader which one we refer to.

Table of Content
  • What is a Phrase?
  • What is an Article?
  • Definite Article
  • Indefinite Article
  • Definite and Indefinite Articles with Examples
  • Rules for Article: “A”
  • Rules for Article: “An”
  • Conclusion
  • Practice Questions on Indefinite Articles: “A”, “An”
  • Indefinite Articles: “A”, “An” – FAQs

What is a Phrase?

A phrase is a collection of syllables that functions as a grammatical unit. It can be used to convey information. It is a main part of a sentence and it cannot work alone in a sentence. Phrases provide additional information about the subject of the sentence. A phrase is a group of words that functions as a unit in a sentence but lacks a subject or a verb. Frequently, phrases are used to describe individuals, things, and events. A phrase consists of a head, which determines the unit’s grammatical status, and one or more optional modifiers. Phrases may incorporate additional phrases.

What is an Article?

An article is a word used without description to denote that a noun is a noun. An article is a form of an adjective that describes particular or general nouns and their equivalents. The three English articles are “a,” “an,” and “the.” These words are called determinants and precede the noun they modify or describe.

An article is a term that indicates whether the noun or noun phrase that follows it is general or specific. They function similarly to adjectives in that they alter or modify a noun. In the sentence Nick purchased a canine, the article indicates that the word dog is a noun. Additionally, articles can modify anything that functions as a noun, including pronouns and noun phrases.

Definite Article

An article is a term that typically identifies a noun (or noun equivalent) in a sentence without describing it. A definite article indicates that a noun refers to a specific or previously identified entity.

Contrast the definite article with the indefinite article (“a” or “an”), which characterizes something as generic. (e.g., something generic or something mentioned for the first time).

As a definite article, it refers to particular things/groups or those already identified. The is also used to refer to something unique, in that only one exists.

Indefinite Article

An article is a term that typically identifies a noun (or noun equivalent) in a sentence without describing it. An indefinite article refers to a noun without specifying it or introducing a noun.

There are two indefinite articles in English: a and an. In general, an is used before consonant-beginning words and before vowel-beginning words. The indefinite article is a; it refers to a singular but vague person or thing. The article an is used when the next word begins with a vowel sound.

The indefinite article contrasts with the specific, definite article (“the”). We use indefinite articles when referring to an unknown object or amount. We use them when we need to know what we are referring to.

Definite and Indefinite Articles with Examples

Indefinite Articles: A, AN
  1. A girl who was wearing a yellow hat
  2. She’s an airline pilot.
  3. I’m going to eat an apple.
  4. I felt a bit depressed.
Definite Article: THE
  1. The nights get shorter in the summer.
  2. I’m going to eat the apple.

Rules for Article: “A”

  • Rule-1: The article ‘ a’ is used before a consonant word or a vowel with a consonant tone.
  • Rule-2: The article “a” indicates that the modified noun is indefinite and refers to any group member.
  • Rule-3: A singular common noun always requires the article ‘a’, but a plural common noun does not require any article.
  • Rule-4: A is utilized to convert a Proper noun into a Common noun. Proper nouns do not require articles, but an is added to make them common nouns.
  • Rule-5: Occasionally, indefinite articles are used to refer to the numbers “one,” “each,” and “per.”
  • Rule-6: In the case of many, an or a – appears after the determiner.
Using Indefinite Articles: “A”

The indefinite article precedes an adjective, followed by a singular, countable noun. Remember that in this instance, the use of a/an depends on the first syllable of the adjective, not the following noun. If there is no noun following the adjective, there is no need to use the indefinite article.

Consider the subsequent examples
  1. I want to buy a car.
  2. I need a stamp for this letter.
  3. She is a doctor.
  4. A dog barked all night.
  5. I go on holiday twice a year.
  6. My father is a car mechanic.

Rules for Article: “An”

  • Rule-1: “An” is used before vowel-sound-beginning words. The English alphabet’s vowels are A, E, I, O, and U.
  • Rule-2: If the initial letter produces a vowel-like sound, “an” is used.
  • Rule-3: Use “an” before an unsounded or silent “h.” Since “h” has no phonetic representation or audible sound, the following sound is a vowel; therefore, “an” is used.
Using Indefinite Articles: “An”

The sound of the words starting immediately following the indefinite article determines whether “a” or “an” should be used. That term may be an adjective or a noun depending on the context. The choice of indefinite article alters when an adjective with a distinct first sound is added to the noun it is moderating.

If someone said, “Give me an apple,” you might be tempted to go outside and grab one off the tree or even dash inside and purchase one. The speaker has made it clear that he or she is seeking any apple, as opposed to a particular apple, by using the word an.

There are instances when the article “An” may precede a consonant. The most effective method for remembering this is to trust how the sentence sounds in your mind when you say it aloud.

  • I bought an umbrella just before the rain started.
  • An eager child ran into the store.
  • He is an NFL coach
  • We saw an airplane fly across the sky.
  • The sushi chef-prepared meals for a hungry crowd.


The articles “a” and “an” are used before a noun whose identity is not specified. They are used to refer to general concepts rather than specific instances. When and how to use the indefinite article depends on the beginning tone of the word. “A” precedes words that begin with a consonant, whereas “An” precedes words that begin with a vowel.

Practice Questions on Indefinite Articles: “A”, “An”

  1. I’ve got ___ good news for you.
  2. Give me ___ book which is on the table.
  3. I have___ surprise for you.
  4. There is ___ green English book on the desk.
  5. Ronaldo is ___ famous football player.
  6. My friend likes to be ___ astronaut.
  7. She’s reading ___ old comic.
  8. He is drinking ___ cup of coffee.
  9. Look! There’s ___ bird flying.
  10. There is ___ green English book on the desk.
  1. a
  2. a
  3. a
  4. a
  5. a
  6. an
  7. an
  8. a
  9. a
  10. a

FAQs on Indefinite Articles: “A”, “An”

Even when a vowel is used to make the consonant sound (as in “a sample” or “a model”), the letter “A” is used before those terms. (“a unit”).

Even if the term begins with a silent consonant, the prefix “an” is used before words that begin with vowel sounds, such as “an equation” or “an element.” (“an hour”).

Generally, we use “a” and “an” before all countable words, such as a boat, an apple, or an egg. They are not typically used before air, water, or anything with more than one, which we cannot enumerate. In a noun phrase, “a” or “an” appears before a noun and an adjective.

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