| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [to-vb] [conj] it [is] | 11 |
|
| 2 | [adv] difficult [to-vb] [conj] it [is] | 11 |
|
| 3 | be difficult [to-vb] [conj] it [is] | 8 |
|
| 4 | [be] difficult [to-vb] [conj] it [is] | 8 |
|
| 5 | [is] difficult [to-vb] [conj] it [is] | 6 |
|
| 6 | difficult [to-vb] [conj] it [is] [adj] | 5 |
|
