Révision et consolidation des modaux

Les modaux et leurs usages

• can → capacité / possibilité : She can swim very fast.
• must → obligation forte : You must wear a seatbelt.
• should → conseil : You should eat more vegetables.
• might / may → possibilité : It might rain tomorrow.
• have to → obligation externe : I have to finish this homework.

Stratégie pour les exercices à trous

• Demande-toi : obligation, conseil, capacité ou possibilité ?
• Repère les mots indices : maybe, perhaps, always, never…
• You must not run in the corridor. → règle = obligation
• She can speak three languages. → capacité

Paires de modaux équivalents

• must ↔ have to (obligation) : You must study. → You have to study.
• can ↔ be able to (capacité) : He can run fast. → He is able to run fast.
• should ↔ ought to (conseil) : You should rest. → You ought to rest.
• may ↔ might (possibilité) : She may come. → She might come.

Attention !

• must (obligation forte) ≠ should (conseil) — ne pas les confondre.
• You should wear a seatbelt by law. → You must wear a seatbelt by law.
• Vérifie toujours que le sens reste identique après la reformulation.

Les deux types d'erreurs avec les modaux

• Mauvais modal choisi (sens incorrect)
• Mauvaise structure après le modal

Règle d'or

Après un modal → infinitif sans 'to' (base form). Pas de -s, pas de -ing, jamais deux modaux ensemble.

Exemples corrigés

• She cans play the piano. → She can play the piano.
• You must to leave now. → You must leave now.
• He should goes to the doctor. → He should go to the doctor.
• They might can come tomorrow. → They might come tomorrow.

Questions à se poser

1. Le modal est-il adapté au sens (obligation, conseil, possibilité…) ?
2. Le verbe après le modal est-il bien à la base form ?