| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that it is difficult [prep] [pron] | 7 |
|
| 2 | that it is difficult for [pron] | 7 |
|
| 3 | that it is difficult for [pron] | 7 |
|
| 4 | that it is difficult [prep] [pron] | 7 |
|
| 5 | that it is difficult [prep] [pers pn] | 5 |
|
