Overview of Indefinite Articles

Indefinite articles in Spanish are used to refer to non-specific nouns, similar to "a," "an," and "some" in English. They introduce a noun without identifying a particular person, place, or thing. These articles match the gender and number of the noun they modify.

Forms of Indefinite Articles

Spanish indefinite articles vary by gender and number. For masculine singular nouns, "un" is used, while "una" is the form for feminine singular nouns. For plural nouns, "unos" is used for masculine or mixed-gender groups, and "unas" is used for feminine groups.

Usage of Indefinite Articles

Indefinite articles are commonly used when mentioning something for the first time or speaking about something general or unknown. They are omitted when referring to professions after the verb "to be" (ser) or when the noun is uncountable in Spanish.

Examples with Indefinite Articles

  • Un libro – A book
  • Una casa – A house
  • Unos amigos – Some friends (masculine or mixed group)
  • Unas flores – Some flowers (feminine)

Summary

Understanding indefinite articles helps in correctly constructing sentences that involve non-specific nouns, ensuring agreement in gender and number between the article and noun.

Conjugations

Since indefinite articles are not verbs, they do not have conjugations. Their forms depend solely on the noun's gender and number as shown in the table below:
Spanish ArticleGenderNumberEnglish Equivalent
unmasculinesingulara / an
unafemininesingulara / an
unosmasculine/mixedpluralsome
unasfemininepluralsome
Loco