| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] have been trying | 19 |
|
| 2 | who [verb] been trying | 19 |
|
| 3 | [Wh pn] [vb past] been trying | 9 |
|
| 4 | [Wh pn] [vb -s] been trying | 6 |
|
| 5 | [Wh pn] had been trying | 6 |
|
| 6 | [Wh pn] has been trying | 5 |
|
