| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] could | 6733 |
|
| 2 | [pron] could have | 5696 |
|
| 3 | [verb] [pron] have | 4140 |
|
| 4 | [verb] could have | 62 |
|
