| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] difficult not [verb] that | 7 |
|
| 2 | [pers pn] [is] difficult not [verb] that | 7 |
|
| 3 | [pers pn] [be] difficult not [to-vb] that | 7 |
|
| 4 | [pers pn] be difficult not [verb] that | 7 |
|
| 5 | [pers pn] is difficult not [verb] that | 7 |
|
