| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] [verb] and | 247 |
|
| 2 | it [be] difficult [verb] [conj] | 233 |
|
| 3 | [pron] [be] difficult [verb] and | 27 |
|
| 4 | [pers pn] [be] difficult [verb] and | 22 |
|
| 5 | it [be] difficult [verb] and | 13 |
|
