| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [verb] [adj] [noun] | 126 |
|
| 2 | it is difficult [verb] [det] [noun] | 63 |
|
| 3 | it is [adj] [verb] such [noun] | 33 |
|
| 4 | it be difficult [verb] such [noun] | 8 |
|
| 5 | [pron] is difficult [verb] such [noun] | 8 |
|
| 6 | it is difficult [verb] such [noun] | 8 |
|
| 7 | it [be] difficult [verb] such [noun] | 8 |
|
| 8 | it [is] difficult [verb] such [noun] | 8 |
|
| 9 | [pers pn] is difficult [verb] such [noun] | 8 |
|
| 10 | it is difficult [verb] such [noun] | 8 |
|
