| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [adv] difficult [verb] into | 7 |
|
| 2 | [pers pn] [adv] difficult [to-vb] into | 7 |
|
| 3 | it [adv] difficult [verb] into | 7 |
|
| 4 | [pers pn] very difficult [verb] into | 5 |
|
