| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [be] difficult [verb] | 551 |
|
| 2 | be [conj] it [be] [verb] | 185 |
|
| 3 | be [conj] it [be] difficult | 17 |
|
| 4 | be it [be] difficult [verb] | 6 |
|
