| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] had been [verb] | 3311 |
|
| 2 | [noun prp] had [verb] an | 291 |
|
| 3 | had been [verb] an | 82 |
|
| 4 | [noun prp] had been an | 58 |
|
