| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] for them [verb] | 110 |
|
| 2 | it [be] difficult for [pron] [verb] | 73 |
|
| 3 | it [be] difficult for [pers pn] [verb] | 68 |
|
| 4 | it [be] difficult [prep] them [verb] | 15 |
|
| 5 | it [be] difficult for they [verb] | 15 |
|
| 6 | [pron] [be] difficult for them [verb] | 15 |
|
| 7 | it [be] difficult [prep] them [verb] | 15 |
|
| 8 | it [be] difficult for them [verb] | 15 |
|
