| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [verb] [pron] | 1288 |
|
| 2 | [vb mod] have [verb] his | 596 |
|
| 3 | [modal v] have [verb] his | 596 |
|
| 4 | could [verb] [verb] his | 114 |
|
| 5 | could have [verb] his | 83 |
|
