| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they had [vb pp] [art] | 1229 |
|
| 2 | they had been [vb pp] | 969 |
|
| 3 | had been [vb pp] [art] | 671 |
|
| 4 | they had been [art] | 28 |
|
