| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] be difficult for | 80 |
|
| 2 | it be difficult for we | 19 |
|
| 3 | [vb mod] be difficult for we | 7 |
|
| 4 | it [vb mod] be for we | 6 |
|
