| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adj] to | 637 |
|
| 2 | it [adj] to | 492 |
|
| 3 | it difficult [prep] | 255 |
|
| 4 | [pron] difficult to | 23 |
|
| 5 | it difficult to | 23 |
|
| 6 | it difficult to | 23 |
|
| 7 | [pers pn] difficult to | 23 |
|
