| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adj] for | 2822 |
|
| 2 | it [is] difficult [prep] | 278 |
|
| 3 | it [be] difficult for | 228 |
|
| 4 | [pron] [is] difficult for | 176 |
|
| 5 | [pers pn] [is] difficult for | 170 |
|
| 6 | it [is] difficult for | 169 |
|
