| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] difficult [to-vb] [prep] [det] [noun] | 27 |
|
| 2 | is difficult [verb] [prep] [det] [noun] | 26 |
|
| 3 | [is] difficult [verb] [prep] [det] [noun sg] | 16 |
|
| 4 | [is] difficult [verb] [prep] [det] [noun pl] | 9 |
|
| 5 | [is] difficult [verb] [prep] any [noun] | 9 |
|
| 6 | [is] difficult [verb] [prep] this [noun] | 8 |
|
| 7 | [is] difficult [verb] with [det] [noun] | 7 |
|
| 8 | [is] difficult [verb] in [det] [noun] | 6 |
|
