| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] he could have | 75 |
|
| 2 | [verb] [vb pp] he could | 35 |
|
| 3 | [vb pp] he could have | 9 |
|
| 4 | [verb] [vb pp] could have | 7 |
|
