| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] for | 3918 |
|
| 2 | it [be] difficult [prep] | 362 |
|
| 3 | [pron] [be] difficult for | 237 |
|
| 4 | [pers pn] [be] difficult for | 229 |
|
| 5 | it [be] difficult for | 228 |
|
