| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [verb] been in the | 6 |
|
| 2 | [pers pn] could [verb] been in the | 6 |
|
| 3 | could [verb] been [verb] in the | 21 |
|
| 4 | could [verb] been [vb pp] in the | 18 |
|
| 5 | could [verb] been in the [adj] | 5 |
|
