| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [conj] [pron] [is] difficult | 59 |
|
| 2 | [conj] [pron] [is] difficult for | 48 |
|
| 3 | [verb] [conj] [pron] [is] for | 35 |
|
| 4 | [verb] [pron] [is] difficult for | 6 |
|
