| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [vb pp] at | 117 |
|
| 2 | [modal v] have been [vb pp] a | 67 |
|
| 3 | [modal v] have [vb pp] at a | 15 |
|
| 4 | have been [vb pp] at a | 12 |
|
| 5 | [modal v] have been at a | 5 |
|
