| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adj] [adv] | 3343 |
|
| 2 | it [be] difficult [adv] | 113 |
|
| 3 | [pron] [is] difficult [adv] | 92 |
|
| 4 | [pers pn] [is] difficult [adv] | 91 |
|
| 5 | it [is] difficult [adv] | 91 |
|
