| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] be [verb] at the | 28 |
|
| 2 | which [vb past] been [verb] at the | 28 |
|
| 3 | which [vb past] [been] [verb] at the | 28 |
|
| 4 | which had [be] [verb] at the | 28 |
|
| 5 | which [vb past] [be] [vb pp] at the | 27 |
|
