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