| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] for [pers pn] | 332 |
|
| 2 | it [be] difficult for [pers pn] | 88 |
|
| 3 | it be difficult for [pers pn] | 88 |
|
| 4 | it [is] difficult for [pers pn] | 67 |
|
| 5 | it is difficult for [pron] | 57 |
|
| 6 | [pron] is difficult for [pers pn] | 50 |
|
| 7 | it is difficult [prep] [pers pn] | 49 |
|
