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ACADEMIC AREA : BACHELOR IN ENGLISH
TOPIC: INDEFINITE ARTICLES A AND AN
SUBJECT : ENGLISH 1
BY
PROF. GUSTAVO CASTILLO
INDEFINITE ARTICLES: A AND AN
• Indefinite articles are used when we are referring to an unspecified
thing or quantity. We use them when we don’t know (or don’t care)
which thing we’re talking about.
HOW TO USE THE INDEFINITE ARTICLES A VS. AN
• 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.
USE A WHEN THE INDEFINITE ARTICLE COMES BEFORE A
WORD BEGINNING WITH A CONSONANT SOUND.
• Example:
• a laptop a sticky notes a calculator
USE AN WHEN THE INDEFINITE ARTICLE COMES BEFORE
A WORD BEGINNING WITH A VOWEL SOUND:
• EXAMPLE :
an eraser an index cards an umbrella
EXCEPTIONS
• It’s important to note that not all nouns that begin with a consonant begin with
the consonant sound. Always trust the sound, not the letter when applying the a
vs. an rule. Remember, it’s about pronunciation. Consider the examples below:
• Incorrect: a hourglass.
• Correct: an hourglass.
EXCEPTIONS
• Likewise, there are some nouns beginning with a vowel that make a consonant
sound. In these cases, the indefinite article a should be used. Consider the
examples below:
• Incorrect: an university .
• Correct: a university .
USING A VS. AN WITH ACRONYMS
These same rules apply to acronyms:
• Correct: A Society of Writers member was quoted in the article.
• Incorrect: A S.O.W. member was quoted in the article.
• Correct: An S.O.W. member was quoted in the article.
Because S sounds like it begins with a vowel (ess), an should be used in front of it.
Indefinite articles

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Indefinite articles

  • 1. ACADEMIC AREA : BACHELOR IN ENGLISH TOPIC: INDEFINITE ARTICLES A AND AN SUBJECT : ENGLISH 1 BY PROF. GUSTAVO CASTILLO
  • 2. INDEFINITE ARTICLES: A AND AN • Indefinite articles are used when we are referring to an unspecified thing or quantity. We use them when we don’t know (or don’t care) which thing we’re talking about.
  • 3. HOW TO USE THE INDEFINITE ARTICLES A VS. AN • 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.
  • 4. USE A WHEN THE INDEFINITE ARTICLE COMES BEFORE A WORD BEGINNING WITH A CONSONANT SOUND. • Example: • a laptop a sticky notes a calculator
  • 5. USE AN WHEN THE INDEFINITE ARTICLE COMES BEFORE A WORD BEGINNING WITH A VOWEL SOUND: • EXAMPLE : an eraser an index cards an umbrella
  • 6. EXCEPTIONS • It’s important to note that not all nouns that begin with a consonant begin with the consonant sound. Always trust the sound, not the letter when applying the a vs. an rule. Remember, it’s about pronunciation. Consider the examples below: • Incorrect: a hourglass. • Correct: an hourglass.
  • 7. EXCEPTIONS • Likewise, there are some nouns beginning with a vowel that make a consonant sound. In these cases, the indefinite article a should be used. Consider the examples below: • Incorrect: an university . • Correct: a university .
  • 8. USING A VS. AN WITH ACRONYMS These same rules apply to acronyms: • Correct: A Society of Writers member was quoted in the article. • Incorrect: A S.O.W. member was quoted in the article. • Correct: An S.O.W. member was quoted in the article. Because S sounds like it begins with a vowel (ess), an should be used in front of it.