| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult for [pers pn] [to-vb] [pron] | 18 |
|
| 2 | be difficult for [pron] [to-vb] [pron] | 9 |
|
| 3 | be difficult for [pron] [to-vb] [pers pn] | 8 |
|
| 4 | be difficult for us [to-vb] [pron] | 6 |
|
| 5 | be difficult for we [to-vb] [pron] | 6 |
|
| 6 | is difficult for [pron] [to-vb] [pron] | 6 |
|
| 7 | be difficult for [pron] [to-vb] [pos pn] | 5 |
|
