There are 4 forms of the indefinite article in Spanish. The indefinite article must agree in both gender and number with the noun. The only time this is not the case is with feminine nouns that begin with a stressed “a”. (See list below)
| singular | plural | |
|---|---|---|
| masculine | un | unos |
| feminine | una | unas |
Any noun that begins with a stressed “a” or “ha” will use the indefinite article un. However, these nouns will use unas in their plural form, just like all other plural feminine nouns. Here are some examples:
| soul hunger | un alma, but unas almas un hambre, but unas hambres |
The indefinite article in Spanish is equivalent to the English articles “a”, “an” and “some/several”.
| a hat some hats a house some houses | un sombrero unos sombreros una casa unas casas |