Grammar A1 - a and an

The following points summarize the usage of the articles "a" and "an":

• Purpose: The articles "a" and "an" are used to refer to a single item that is not specific or already known to the listener.
• Selection Rule: The choice between the two is determined by the sound and rhythm of the following word, not its spelling.
• Using "A": This is used before words that begin with a consonant sound. Examples include "a car," "a banana," and "a zoo".
• Using "An": This is used before words that begin with an open vowel sound (a, e, i, o, or u) to help the words flow together smoothly.
• Prioritizing Sound Over Spelling: Because English spelling can be misleading, one should trust their ears regarding the first sound heard rather than relying on the written word.
  • For example, "university" begins with a "y" consonant sound, so it is "a university".
  • Conversely, because the "h" in "hour" is silent, it begins with a vowel sound, requiring "an hour".