| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [verb] [pers pn] | 15470 |
|
| 2 | could [not/n't] [verb] [pron] | 5483 |
|
| 3 | could [adv] [verb] [pers pn] | 4159 |
|
