| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [prep] [art] | 56339 |
|
| 2 | difficult [verb] [prep] [art] | 448 |
|
| 3 | [be] difficult [verb] [art] | 119 |
|
| 4 | [be] difficult [verb] [prep] | 115 |
|
| 5 | [be] difficult [prep] [art] | 47 |
|
