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Usages of sérieux
Marie est sérieuse au travail.
Marie is serious at work.
Ses parents sont sérieux quand ils parlent des devoirs.
Her parents are serious when they talk about homework.
Paul change de sujet quand la conversation devient trop sérieuse.
Paul changes the subject when the conversation becomes too serious.
C'est la candidate la plus sérieuse que le responsable ait vue aujourd'hui.
She is the most serious candidate that the manager has seen today.
Cette maladie est sérieuse, mais les médecins restent confiants.
This illness is serious, but the doctors remain confident.
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“How does grammatical gender work in French?”
Every French noun is either masculine or feminine, and this affects the articles and adjectives used with it. "Le" is used with masculine nouns and "la" with feminine ones. Adjectives also change form to match — for example, "petit" (masc.) becomes "petite" (fem.).
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