| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] very difficult for [pers pn] [to-vb] | 13 |
|
| 2 | [is] very difficult for [pers pn] [verb] | 13 |
|
| 3 | is very difficult for [pers pn] [verb] | 8 |
|
| 4 | 's very difficult for [pers pn] [verb] | 5 |
|
