| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [verb] | 5175 |
|
| 2 | could have [vb pp] | 5143 |
|
| 3 | [modal v] have gone | 927 |
|
| 4 | could have gone | 219 |
|
| 5 | could [verb] gone | 219 |
|
| 6 | could [vb infin] gone | 219 |
|
| 7 | could have go | 204 |
|
