Modal auxiliary can - could
Present | Present continuous | Preterite | Preterite continuous |
can't I? can't you? can't he? can't we? can't you? can't they? | - | couldn't I? couldn't you? couldn't he? couldn't we? couldn't you? couldn't they? | - |
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 | ||
- | - |