| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [to-vb] [conj] it [be] [verb] | 45 |
|
| 2 | difficult [to-vb] [conj] [pron] [be] [verb] | 27 |
|
| 3 | difficult [verb] [conj] it [be] [verb] | 9 |
|
