| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] be difficult for us | 19 |
|
| 2 | [pron] be difficult for us | 19 |
|
| 3 | it be difficult for us | 19 |
|
| 4 | it be difficult for us | 19 |
|
| 5 | [pron] is difficult for us | 16 |
|
