| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] n't [pron] [adv] | 256 |
|
| 2 | could [adv] [pron] [adv] | 53 |
|
| 3 | could [not/n't] [pron] [adv] | 52 |
|
| 4 | could not [pron] [adv] | 52 |
|
