The most important rule
The adjective changes with the noun: masculine, feminine, singular and plural.
| Type | Singular | Plural |
|---|---|---|
| Masculine | un libro nuovo | libri nuovi |
| Feminine | una casa nuova | case nuove |
| Adjectives in -e | un corso interessante | corsi interessanti |
Remember: many adjectives in -e are equal to the masculine and feminine singular: an interesting film, an interesting lesson.

