📘 For et since
📐 FOR — durée
For + durée : pendant, depuis (combien de temps).
I have lived here for three years. She worked there for two years.
Expressions : for a long time, for ages, for a few days, for months.
📐 SINCE — point de départ
Since + moment précis dans le passé : depuis (quand).
I have known him since 2015. She has been sad since the accident.
Expressions : since Monday, since last year, since I was born, since then.
📐 Temps utilisés
• Present perfect + for/since → action toujours en cours :
I have lived here for/since… → J’habite ici depuis…
• Prétérit + for → action terminée :
She worked there for two years. (elle n’y travaille plus)
💡 À retenir
• for + durée (for 3 years) = pendant / depuis.
• since + moment précis (since 2020) = depuis.
• Present perfect + for/since → toujours en cours.