| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | very difficult for [pron] [to-vb] | 34 |
|
| 2 | very difficult for [pers pn] [to-vb] | 34 |
|
| 3 | very difficult for [pron] [to-vb] | 34 |
|
| 4 | very difficult for we [to-vb] | 11 |
|
| 5 | very difficult for us [to-vb] | 11 |
|
| 6 | very difficult for i [to-vb] | 9 |
|
| 7 | very difficult for me [to-vb] | 9 |
|
| 8 | very difficult for they [to-vb] | 7 |
|
| 9 | very difficult for them [to-vb] | 7 |
|
