| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [prep] [adj] | 24617 |
|
| 2 | difficult [prep] [adj] | 388 |
|
| 3 | [pers pn] difficult [prep] | 255 |
|
| 4 | [pers pn] difficult [adj] | 5 |
|
