| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] it [adj] [prep] | 528 |
|
| 2 | [verb] it difficult [prep] | 249 |
|
| 3 | [vb infin] [pron] difficult [prep] | 39 |
|
| 4 | [vb infin] [pers pn] difficult [prep] | 39 |
|
| 5 | [vb infin] it difficult [prep] | 39 |
|
