| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [to-vb] [prep] | 143 |
|
| 2 | it is [adj] [to-vb] for | 114 |
|
| 3 | it is [adj] [to-vb] for | 103 |
|
| 4 | it [be] difficult [to-vb] for | 14 |
|
| 5 | it be difficult [to-vb] for | 14 |
|
| 6 | it is difficult [to-vb] for | 13 |
|
| 7 | it is difficult [to-vb] for | 13 |
|
| 8 | [pron] is difficult [to-vb] for | 13 |
|
| 9 | it is difficult [verb] for | 13 |
|
| 10 | [pers pn] is difficult [to-vb] for | 13 |
|
| 11 | it [is] difficult [to-vb] for | 13 |
|
