| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] [noun pl] | 2889 |
|
| 2 | could have been [verb] [prep] | 541 |
|
| 3 | could have [verb] [prep] [noun pl] | 18 |
|
| 4 | could have been [verb] [noun pl] | 8 |
|
