| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [verb] [adj] [noun] | 126 |
|
| 2 | it is [adj] [verb] such [noun] | 33 |
|
| 3 | [pron] is difficult [verb] such [noun] | 8 |
|
| 4 | it be difficult [verb] such [noun] | 8 |
|
| 5 | it [is] difficult [verb] such [noun] | 8 |
|
| 6 | it [be] difficult [verb] such [noun] | 8 |
|
