| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] difficult for [pron] [to-vb] | 116 |
|
| 2 | [be] for [pron] [to-vb] [pers pn] | 25 |
|
| 3 | difficult for [pron] [to-vb] [pers pn] | 16 |
|
