| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [vb pp] | 31868 |
|
| 2 | [n mass] had [vb pp] | 894 |
|
| 3 | [n mass] had been | 551 |
|
| 4 | [n mass] been [vb pp] | 17 |
|
