| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [be] [prep] | 362 |
|
| 2 | [vb past] [be] working [prep] | 180 |
|
| 3 | who [be] working [prep] | 141 |
|
| 4 | who [vb past] [be] working | 19 |
|
