| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] been [vb pp] open | 6 |
|
| 2 | [Wh det] have been [vb pp] open | 6 |
|
| 3 | [Wh det] had been [vb pp] open | 6 |
|
| 4 | [Wh det] [vb past] been [vb pp] open | 6 |
|
