| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [verb] at the [noun sg] | 28 |
|
| 2 | who [vb past] [vb pp] at the [noun] | 24 |
|
| 3 | who had [verb] at the [noun] | 21 |
|
| 4 | who [vb past] [v-ing] at the [noun] | 6 |
|
