| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] be difficult [prep] us | 5 |
|
| 2 | it would be difficult [prep] us | 5 |
|
| 3 | it [modal v] be difficult [prep] us | 5 |
|
| 4 | it would be difficult [prep] us | 5 |
|
| 5 | it [modal v] be difficult for us | 5 |
|
| 6 | it [modal v] be difficult for us | 5 |
|
| 7 | it [modal v] be difficult [prep] us | 5 |
|
| 8 | it [modal v] be difficult [prep] us | 5 |
|
