| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [to-vb] that | 97 |
|
| 2 | it [is] difficult to believe that | 45 |
|
| 3 | it [is] difficult to imagine that | 14 |
|
| 4 | it [is] difficult to argue that | 10 |
|
| 5 | it 's difficult [to-vb] that | 5 |
|
| 6 | it [is] difficult to say that | 5 |
|
