| Positive |
|||
| Modal | Past | Future | |
| 1a | will | will/would have | will be |
| 2a | must | must have | – |
| 3a | should | should have | should be |
| 4a | ought to | ought to have | ought to be |
| 5a | might | might have | might be |
| 6a | could | could have | could be |
| 7a | may | may have | may be |
| Negative | |||
| Modal | Past | Future | |
| 1b | will not | will/would not have | will not be |
| 2b | must not | must not have | – |
| 3b | should not | should not have | should not be |
| 4b | ought not | ought not have | ought not be |
| 5b | might not | might not have | might not be |
| 6b | could not | could not have | could not be |
| 7b | may not | may not have | may not be |