| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [verb] at the | 44 |
|
| 2 | [Wh pn] [vb past] [vb pp] at the | 34 |
|
| 3 | [Wh pn] had [verb] at the | 31 |
|
| 4 | [Wh pn] [vb past] [v-ing] at the | 6 |
|
| 5 | [Wh pn] [vb past] [to-vb] at the | 5 |
|
