| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] up [prep] | 3873 |
|
| 2 | [adv] difficult [verb] [prep] | 541 |
|
| 3 | [adv] difficult [verb] up | 32 |
|
| 4 | difficult [verb] up [prep] | 23 |
|
