| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [vb pp] | 31868 |
|
| 2 | had [vb pp] [art] | 25229 |
|
| 3 | had [been] [art] | 5302 |
|
| 4 | [been] [vb pp] [art] | 2718 |
|
