| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] difficult [to-vb] [conj] it | 23 |
|
| 2 | be difficult [to-vb] [conj] it | 23 |
|
| 3 | [be] difficult [to-vb] [conj] it | 23 |
|
| 4 | [is] difficult [to-vb] [conj] it | 13 |
|
| 5 | [be] difficult [to-vb] [subord] it | 13 |
|
| 6 | is difficult [to-vb] [conj] it | 10 |
|
| 7 | [be] difficult [to-vb] [coord] it | 6 |
|
