| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult for [indef pn] | 11 |
|
| 2 | it be difficult for [indef pn] | 11 |
|
| 3 | it be difficult for [indef pn] | 11 |
|
| 4 | it be difficult for anyone | 9 |
|
| 5 | it is difficult for [indef pn] | 7 |
|
