| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [verb] that [noun] | 574 |
|
| 2 | it [is] difficult [verb] [noun] | 142 |
|
| 3 | it [is] difficult [verb] that | 102 |
|
| 4 | [is] difficult [verb] that [noun] | 17 |
|
| 5 | it difficult [verb] that [noun] | 7 |
|
