| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [adv] [verb] | 1458 |
|
| 2 | [not/n't] [pers pn] [adv] [verb] | 746 |
|
| 3 | could [pers pn] [adv] [verb] | 579 |
|
| 4 | could [not/n't] [pers pn] [verb] | 335 |
|
| 5 | could [not/n't] [pers pn] [adv] | 46 |
|
