1. Les adjectifs
Adjectives

2. Definition
ADJECTIVES are words that describe people, places, and things. In French, MASCULINE adjectives are used with masculine nouns, and FEMININE adjectives are used with feminine nouns. This is the NOUN-ADJECTIVE AGREEMENT

3. Masculine and feminine forms
In French, feminine adjectives are usually formed as follows:
MASCULINE ADJECTIVE + -e = FEMININE ADJECTIVE
grand grande
Usually the masculine and feminine forms are pronounced differently.

4. Exceptions Jérôme est jeune. Juliette est jeune.
If the masculine adjective ends in -e, there is no change in the feminine form.
Jérôme est jeune.
Juliette est jeune.

5. Plural forms
In French, plural adjectives are usually formed as follows:
SINGULAR ADJECTIVE + -s = PLURAL ADJECTIVE
un garçon intelligent des garçons intelligents
une fille intelligente des filles intelligentes
The plural ending –s is silent.

6. Exceptions
If the masculine adjective ends in –s in the singular form, there is no change in the masculine plural form.
Marc est français.
Antoine et Éric sont français.

7. SUMMARY: Forms of regular adjectives
masculine
feminine
singular -
grand -e
grande
plural -s
grands
-es
grandes

8. Regular and Irregular adjectives
Adjectives that follow the above patterns are called REGULAR adjectives. Those that do not are called IRREGULAR adjectives. For example:
Marc est beau.
Sylvie est belle.

9. Adjectives describing personality traits
amusant, -e amusing, fun intelligent, -e intelligent intéressant, -e interesting méchant, -e mean, nasty bête silly, dumb sympathique nice, pleasant timide timid, shy gentil, (gentille) nice, kind mignon (mignonne) cute sportif (sportive) athletic

10. Adjectives describing nationality
américain, -e American mexicain, -e Mexican français, -e French anglais, -e English espagnol, -e Spanish japonais, -e Japanese chinois, -e Chinese suisse Swiss italien (italienne) Italian canadien (canadienne) Canadian

11. Position of adjectives
In French, adjectives usually come AFTER the noun they describe, according to the pattern:
ARTICLE + NOUN + ADJECTIVE
une voiture française
des copains intéressants