| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult it be for [pron] [to-vb] | 7 |
|
| 2 | difficult [pers pn] be for [pers pn] [to-vb] | 7 |
|
| 3 | difficult [pers pn] be for [pron] [to-vb] | 7 |
|
