| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] at the [noun] | 162 |
|
| 2 | [vb past] [v-ing] at the [noun] | 142 |
|
| 3 | who [vb past] [v-ing] the [noun] | 24 |
|
| 4 | who [vb past] [v-ing] at the | 6 |
|
