Comparatives and Superlatives

You can use plus as a comparative and le/la/les plus as a superlative.

• C'est une plus jolie robe. — That's a prettier dress.
• C'est la plus jolie robe. — That's the prettiest dress.

Bon ("good"), bien ("well"), and mauvais ("bad") also have comparative and superlative forms, but they're irregular, just like their English counterparts.

Bon

To say "better" when referring to a noun, you can't just say plus bon. Instead, use meilleur, which is a BANGS adjective with four inflections.

	masc	fem
sing	meilleur	meilleure
plur	meilleurs	meilleures

• Elle cherche un meilleur emploi. — She is looking for a better job.
• Je veux de meilleures robes. — I want better dresses. (Remember that des becomes de when immediately followed by an adjective.)

For the superlative, just add a definite article before the adjective that agrees with it.

• Paul est le meilleur. — Paul is the best.
• Ses filles sont les meilleures. — Her daughters are the best.

Bien

When "better" modifies an action or state of being, you must use mieux.

• Il parle mieux japonais. — He speaks better Japanese.
• Ça va mieux. — It is going better.

Add a definite article to create a superlative.

• C'est Paul qui cuisine le mieux. — It's Paul who cooks the best.
• Il les connait le mieux. — He knows them the best.

Mauvais

Unlike bon and bien, comparative and superlative forms of mauvais can either be regular (with plus) or irregular (with pire).

• C'est une plus mauvaise situation. — That's a worse situation.
• Ça peut être pire. — That might be worse.
• Ce sont les pires choix. — Those are the worst choices.