| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | very difficult [verb] [noun] | 68 |
|
| 2 | difficult [verb] [noun] [coord] | 38 |
|
| 3 | very difficult [verb] [coord] | 24 |
|
| 4 | very difficult [noun] [coord] | 16 |
|
