| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] n't [verb] [pron] [modal v] [verb] | 86 |
|
| 2 | could [adv] [verb] [pron] [modal v] [verb] | 23 |
|
| 3 | could [not/n't] [verb] [pron] [modal v] [verb] | 15 |
|
| 4 | could not [verb] [pron] [modal v] [verb] | 15 |
|
