Pluriels d'adjectifs (Plurals of adjectives)

General rule

The masculine and feminine plural of adjective is formed by adding an s to the singular form:

-un vélo neuf(a new bike)
-des vélos neufs(new bikes)
-une belle fleur(a beautiful fleur)
-des belles fleurs(beautiful flowers)

Adjective ending in 's' or 'x'

if the masculine singular ends in s or x, there is no need to add the s:

-il est heureux(he is happy)
-ils sont heureux(they are happy)
-un touriste anglais(an English tourist)
-des touristes anglais(English tourists)

Others

Irregular masculine plurals (feminine plurals are all regular)

• al to aux

But:

• eau to eaux