| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [is] [adv] [adj] | 1263 |
|
| 2 | [verb] it [be] [adv] difficult | 57 |
|
| 3 | [verb] it [is] [adv] difficult | 48 |
|
| 4 | [verb] [pron] [is] [adv] difficult | 48 |
|
