| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [verb] could | 8 |
|
| 2 | have been [verb] could | 8 |
|
| 3 | [verb] been [vb pp] could | 7 |
|
| 4 | [vb past] been [verb] could | 6 |
|
| 5 | had been [verb] could | 5 |
|
