| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adv] difficult [to-vb] | 866 |
|
| 2 | [be] [adv] difficult [to-vb] and | 65 |
|
| 3 | it [be] [adv] difficult and | 15 |
|
| 4 | it [be] difficult [to-vb] and | 13 |
|
| 5 | it [adv] difficult [to-vb] and | 8 |
|
| 6 | it [be] [adv] [to-vb] and | 8 |
|
