| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult for [pron] [to-vb] | 41 |
|
| 2 | it is difficult for [pers pn] [to-vb] | 39 |
|
| 3 | it is difficult for us [to-vb] | 12 |
|
| 4 | it is difficult for they [to-vb] | 12 |
|
| 5 | it is difficult for we [to-vb] | 12 |
|
| 6 | it is difficult for them [to-vb] | 12 |
|
| 7 | it is difficult for me [to-vb] | 5 |
|
| 8 | it is difficult for i [to-vb] | 5 |
|
