| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] have been [verb] | 3851 |
|
| 2 | could have been [verb] | 1153 |
|
| 3 | [adj] could have been | 151 |
|
| 4 | [adj] could have [verb] | 110 |
|
