| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult for [indef pn] [to-vb] | 5 |
|
| 2 | it be difficult [prep] anyone [to-vb] | 5 |
|
| 3 | it be difficult [prep] [indef pn] [to-vb] | 5 |
|
| 4 | it be difficult [prep] [indef pn] [to-vb] | 5 |
|
| 5 | it be difficult for [indef pn] [to-vb] | 5 |
|
