| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not [verb] [conj] | 2075 |
|
| 2 | [vb mod] not [verb] [conj] | 2075 |
|
| 3 | could [adv] [verb] [conj] | 1463 |
|
| 4 | could [not/n't] [verb] [conj] | 916 |
|
| 5 | could not [verb] [conj] | 915 |
|
| 6 | could not [verb] [conj] | 454 |
|
