| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adv] difficult it is | 6 |
|
| 2 | [adv] [adv] difficult [pron] is | 6 |
|
| 3 | [adv] [adv] difficult it is | 6 |
|
| 4 | [adv] [adv] difficult [pers pn] is | 6 |
|
| 5 | [adv] [adv] difficult [to-vb] is | 5 |
|
| 6 | [adv] [adv] difficult [verb] is | 5 |
|
