| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] difficult [to-vb] [adj] | 97 |
|
| 2 | it is [adv] difficult [to-vb] [det] | 44 |
|
| 3 | it is [adv] [adj] [to-vb] such | 31 |
|
| 4 | it be [adv] difficult [to-vb] such | 7 |
|
| 5 | it [be] [adv] difficult [to-vb] such | 7 |
|
| 6 | it is [adv] difficult [to-vb] such | 6 |
|
| 7 | it is [adv] difficult [verb] such | 6 |
|
| 8 | it [is] [adv] difficult [to-vb] such | 6 |
|
| 9 | [pron] is [adv] difficult [to-vb] such | 6 |
|
| 10 | [pers pn] is [adv] difficult [to-vb] such | 6 |
|
| 11 | it is [adv] difficult [to-vb] such | 6 |
|
