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