| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [det] [noun] | 170850 |
|
| 2 | difficult [verb] [noun] | 610 |
|
| 3 | difficult [verb] [det] | 387 |
|
| 4 | difficult [det] [noun] | 20 |
|
