| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] have been drinking | 15 |
|
| 2 | who [verb] been drinking | 14 |
|
| 3 | [Wh pn] [vb past] been drinking | 10 |
|
| 4 | [Wh pn] had been drinking | 9 |
|
