| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] still [vb past] [pers pn] difficult | 6 |
|
| 2 | [pron] still [vb past] [pers pn] difficult | 6 |
|
| 3 | still [vb past] [pers pn] difficult [to-vb] | 8 |
|
| 4 | still [vb past] [pers pn] difficult [verb] | 8 |
|
