| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | some [modal v] have been [vb pp] | 17 |
|
| 2 | some [modal v] have been [verb] | 17 |
|
| 3 | some [vb mod] have been [verb] | 17 |
|
| 4 | some may have been [verb] | 13 |
|
| 5 | some may have been [verb] | 13 |
|
