| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult it [modal v] be [to-vb] | 24 |
|
| 2 | [adv] difficult it [vb mod] be [to-vb] | 24 |
|
| 3 | [adv] [adj] it can be [to-vb] | 15 |
|
| 4 | [adv] [adj] it can be [to-vb] | 15 |
|
| 5 | [adv] difficult it can be [verb] | 7 |
|
| 6 | [adv] difficult [pers pn] can be [to-vb] | 6 |
|
| 7 | [adv] difficult [pron] can be [to-vb] | 6 |
|
| 8 | [adv] difficult it can be [to-vb] | 6 |
|
| 9 | [adv] difficult it can be [to-vb] | 6 |
|
| 10 | [adv] difficult it can be [to-vb] | 6 |
|
| 11 | [adv] difficult it can [be] [to-vb] | 6 |
|
