| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] had been [vb pp] by | 148 |
|
| 2 | who had been [verb] by | 144 |
|
| 3 | whom had been [verb] by | 7 |
|
| 4 | [Wh pn] had been appointed by | 7 |
|
| 5 | [Wh pn] had been appoint by | 7 |
|
