| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adj] it is | 306 |
|
| 2 | [adv] difficult it is | 104 |
|
| 3 | [adv] difficult it [be] | 29 |
|
| 4 | [adv] difficult it be | 29 |
|
| 5 | [adv] difficult [pron] is | 27 |
|
| 6 | [adv] difficult it [is] | 25 |
|
| 7 | [adv] difficult it is | 25 |
|
| 8 | [adv] difficult [pers pn] is | 25 |
|
