| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] difficult [to-vb] [prep] the | 17 |
|
| 2 | are difficult [verb] [prep] the | 17 |
|
| 3 | [am/are] difficult [verb] in the | 6 |
|
| 4 | [am/are] difficult [verb] with the | 5 |
|
