Kiroman
Modal | Nature | Contraire | Exemples | be able to | possibilité | cannot ou be unable to | I was able to prevent the theft but I was unable to arrest the thief. | can | possibilité, capacité | cannot | Birds can fly; monkeys cannot. | | permission | cannot ou may not | Can I watch TV? No, you can't. | could | possibilité, capactié | could not | Could there be a virus in this file? No, there couldn't; I ran the anti-virus. | | possibilité (passé) | could not | Could dodo birds fly? No, they couldn't. | | permission | cannot ou may not | Could I open the window? No, you may not. | had better | conseil |