| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [be] | 3396 |
|
| 2 | [vb past] [be] seen | 161 |
|
| 3 | who [vb past] seen | 105 |
|
| 4 | who [be] seen | 68 |
|
