| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult [prep] we [verb] | 24 |
|
| 2 | it be difficult [prep] we | 19 |
|
| 3 | it be [prep] we [verb] | 16 |
|
| 4 | it be difficult [prep] [verb] | 5 |
|
