| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] have been sitting | 22 |
|
| 2 | who [verb] been sitting | 22 |
|
| 3 | [Wh pn] [vb past] been sitting | 21 |
|
| 4 | [Wh pn] had been sitting | 20 |
|
