| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [verb] been missing | 23 |
|
| 2 | [Wh pn] have been missing | 23 |
|
| 3 | [Wh pn] [vb past] been missing | 11 |
|
| 4 | [Wh pn] [vb -s] been missing | 10 |
|
| 5 | [Wh pn] had been missing | 9 |
|
| 6 | [Wh pn] has been missing | 6 |
|
