| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [vb pp] at the | 34 |
|
| 2 | [Wh pn] [vb past] [vb pp] at the | 34 |
|
| 3 | [Wh pn] had [vb pp] at the | 31 |
|
