| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] have been working | 39 |
|
| 2 | who [verb] been working | 39 |
|
| 3 | [Wh pn] [vb past] been working | 19 |
|
| 4 | [Wh pn] had been working | 16 |
|
| 5 | [Wh pn] [vb -s] been working | 12 |
|
| 6 | [Wh pn] has been working | 10 |
|
| 7 | [Wh pn] have been working | 8 |
|
| 8 | [Wh pn] [vb base] been working | 8 |
|
