| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [vb pp] [verb] | 127 |
|
| 2 | could ever have [vb pp] | 62 |
|
| 3 | could ever have [verb] | 62 |
|
| 4 | ever have [vb pp] [verb] | 13 |
|
