| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [verb] [conj] | 915 |
|
| 2 | [vb mod] not [verb] and | 531 |
|
| 3 | [modal v] not [verb] and | 531 |
|
| 4 | could [adv] [verb] and | 270 |
|
| 5 | could not [verb] and | 136 |
|
