| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] at [art] | 720 |
|
| 2 | had been [vb pp] [art] | 671 |
|
| 3 | had [vb pp] at [art] | 582 |
|
| 4 | had been [vb pp] at | 549 |
|
| 5 | had been at [art] | 149 |
|
