| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [vb pp] [prep] [art] | 6344 |
|
| 2 | had [vb pp] back [prep] [art] | 122 |
|
| 3 | been [vb pp] back [prep] [art] | 84 |
|
| 4 | had been [vb pp] back [prep] | 66 |
|
