Modal auxiliary can - could
Present | Present continuous | Preterite | Preterite continuous |
I cannot you cannot he cannot we cannot you cannot they cannot | - | I could not you could not he could not we could not you could not they could not | - |
Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous |
- | - | - | - |
Future | Future continuous | Future perfect | Future perfect continuous |
- | - | - | - |
Present | Present continuous | Past | Past continuous |
- | - | - | - |
Infinitive | Imperative |
Infinitive | Imperative | ||
- | - |
Present | Past | ||
- | - |