| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pers pn] could have | 487 |
|
| 2 | [adv] [verb] [pers pn] could | 369 |
|
| 3 | [adv] [pers pn] could have | 337 |
|
| 4 | [adv] [verb] [pers pn] have | 236 |
|
