| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] be difficult for [indef pn] | 11 |
|
| 2 | be difficult for [indef pn] [to-vb] | 10 |
|
| 3 | [pron] be for [indef pn] [to-vb] | 6 |
|
