| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] could have | 529 |
|
| 2 | [adv] [verb] [pron] could | 408 |
|
| 3 | [adv] [pron] could have | 351 |
|
| 4 | [adv] [verb] [pron] have | 244 |
|
