Last updated Dec 29, 2025 • Reading time: 1 minute
The following word classes have number in Spanish:
- Nouns
- Pronouns
- Adjectives
- Determiners
- Verbs
In nouns and pronouns, number marks express the idea of unity and plurality (one vs. more than one).
In Spanish, in general, we build the plural of a noun by adding -s or -es at the end: casa => casas, perro => perros, doctor => doctores.
Number in adjectives, determiners and verbs does not have an informative function. It's there to match the number in pronouns and nouns:
Ella es alta.
Ellas son altas.
La casa es bonita.
Las casas son bonitas.