Alguno and Ninguno

Alguno and ninguno are a matched pair of indefinite determiners. Alguno means some, any; ninguno is its negative twin, meaning no, not any. They both agree with the noun they modify, both have a short form before masculine singular nouns, and both appear constantly in yes/no questions and denials.

Forms

Notice the shortened forms algún and ningún: the final -o drops and an accent appears on the ú. This happens whenever they sit right before a masculine singular noun.

Alguno in Questions and Statements

Alguno is the go-to word for some or any when asking about existence or mentioning an unspecified item.

In the plural, algunos / algunas always keeps its full form and means some / a few.

Ninguno and Double Negation

Spanish uses double negation freely. When ninguno follows the verb, you also need a no before the verb.

If you place ninguno before the verb, the extra no disappears — but that pattern is much rarer:

Why Ninguno Is Almost Always Singular

Unlike English no books, no friends, Spanish prefers ningún libro, ninguna amiga — singular. The plural ningunos / ningunas exists but sounds odd and is reserved for nouns that have no singular form (ningunas tijeras, no scissors).

Alguno Can Also Be Negative (Rare)

After a noun in a negative sentence, alguno can be an emphatic none at all:

This is a formal, literary use worth recognizing but not one you'll hear every day.

Think of alguno and ninguno as perfect opposites that share the same rules: same agreement pattern, same shortening rule, same position before nouns. Learn one and you're halfway to the other.