| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be very difficult for us | 7 |
|
| 2 | [pers pn] be very difficult for us | 7 |
|
| 3 | [pron] be very difficult for us | 7 |
|
| 4 | it be very difficult for us | 7 |
|
