| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not [verb] [adv] [adv] | 507 |
|
| 2 | could [adv] [verb] [adv] [adv] | 307 |
|
| 3 | could not [verb] [adv] [adv] | 216 |
|
| 4 | could [not/n't] [verb] [adv] [adv] | 216 |
|
| 5 | could not [verb] [adv] [adv] | 102 |
|
