| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [is] [adj] [prep] | 2365 |
|
| 2 | [conj] it [be] difficult [prep] | 102 |
|
| 3 | [conj] [pers pn] [is] difficult [prep] | 78 |
|
| 4 | [conj] [pron] [is] difficult [prep] | 78 |
|
| 5 | [conj] it [is] difficult [prep] | 78 |
|
