| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult [verb] [adj] [noun] | 159 |
|
| 2 | it be [adj] [verb] this [noun] | 129 |
|
| 3 | it be difficult [verb] [det] [noun] | 81 |
|
| 4 | [pron] be difficult [verb] this [noun] | 17 |
|
| 5 | it [be] difficult [verb] this [noun] | 17 |
|
| 6 | it be difficult [verb] this [noun] | 17 |
|
| 7 | [pers pn] be difficult [verb] this [noun] | 17 |
|
| 8 | it be difficult [verb] this [noun] | 17 |
|
