| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult [to-vb] that [noun] | 20 |
|
| 2 | it be difficult [verb] that [noun] | 20 |
|
| 3 | it is difficult [verb] that [noun] | 17 |
|
| 4 | it be difficult [verb] that [noun pl] | 8 |
|
| 5 | it be difficult [verb] that [noun prp] | 8 |
|
| 6 | it be difficult imagine that [noun] | 6 |
|
| 7 | it be difficult to believe that [noun] | 6 |
|
| 8 | it be difficult to imagine that [noun] | 6 |
|
| 9 | it be difficult believe that [noun] | 6 |
|
