| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] difficult [to-vb] [coord] | 22 |
|
| 2 | [pers pn] difficult [verb] [coord] | 21 |
|
| 3 | it difficult [verb] [coord] | 21 |
|
| 4 | it difficult [verb] [coord] | 21 |
|
| 5 | [pron] difficult [verb] and | 14 |
|
| 6 | [pron] difficult [verb] or | 7 |
|
