Adjectives: Number and Gender

In Spanish, adjectives need to match the nouns they modify in number and gender. Number refers to singular and plural—The adjective needs to be singular if the noun is singular and plural if the noun is plural. Gender refers to masculine and feminine forms. Some adjectives do not have masculine and feminine forms (like inteligente). However, if the adjective does have masculine and feminine forms (like casado/casada), then the adjective needs to match the noun. See below:

Note that inteligente does not have different masculine and feminine forms, but it is plural when the noun is plural.

Here, the adjectives match the nouns in number and gender.

The following are examples of noun/adjective agreement in context:

¿Cuántos hijos tienes tú?
Mi papá tiene muchas tías.
Ellas son maestras excelentes.
Él es un piloto famoso.