| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | these have been [vb pp] [prep] a | 12 |
|
| 2 | these have been [verb] [prep] a | 12 |
|
| 3 | these have been [verb] [prep] a | 10 |
|
| 4 | these have been [verb] by a | 5 |
|
| 5 | these have been [verb] by a | 5 |
|
