| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] difficult [verb] | 1819 |
|
| 2 | [adv] it [is] [verb] | 1816 |
|
| 3 | [adv] it [is] difficult | 108 |
|
| 4 | [adv] [is] difficult [verb] | 6 |
|
