| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] had been [verb] [prep] a | 19 |
|
| 2 | [verb] had been [vb pp] [prep] a | 18 |
|
| 3 | [vb past] had been [verb] [prep] a | 11 |
|
| 4 | [vb pp] had been [verb] [prep] a | 7 |
|
