| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] difficult for [pers pn] | 67 |
|
| 2 | it difficult for [pers pn] [to-vb] | 63 |
|
| 3 | [is] difficult for [pers pn] [to-vb] | 54 |
|
| 4 | it [is] for [pers pn] [to-vb] | 53 |
|
