| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been on a | 7 |
|
| 2 | [modal v] have been on a | 7 |
|
| 3 | have been [verb] on a | 14 |
|
| 4 | have been [vb pp] on a | 10 |
|
