General Agreement Rules
To mark the plural, an -s is generally added to the end of singular nouns and adjectives. However, if the word already ends with an -s, -x, or -z, its form does not change in the plural.
- Un chat → des chats (A cat → cats)
- Petit → petits (Small → small ones)
- Un petit chat → des petits chats (A small cat → small cats)
Case of nouns ending in -eu, -au, -eau
For nouns ending in -eu, -au, and -eau, an -x is added to form the plural.
- Un jeu → des jeux (A game → games)
- Un chapeau → des chapeaux (A hat → hats)
- Un bateau → des bateaux (A boat → boats)