| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | only have been [vb pp] [prep] a | 13 |
|
| 2 | only have been [verb] [prep] a | 13 |
|
| 3 | only have been [verb] [prep] a | 13 |
|
| 4 | only have been [verb] by a | 8 |
|
| 5 | only have been [verb] by a | 8 |
|
