| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [to-vb] [conj] it [verb] | 8 |
|
| 2 | [adv] difficult [to-vb] [conj] it [verb] | 8 |
|
| 3 | [be] difficult [to-vb] [conj] it [verb] | 6 |
|
| 4 | be difficult [to-vb] [conj] it [verb] | 6 |
|
| 5 | difficult [to-vb] [conj] it [be] [verb] | 9 |
|
| 6 | difficult [to-vb] [conj] it be [verb] | 9 |
|
| 7 | difficult [to-vb] [conj] it was [verb] | 5 |
|
| 8 | difficult [to-vb] [conj] it [was/were] [verb] | 5 |
|
