| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] difficult for [pron] [verb] | 66 |
|
| 2 | [pron] is difficult for [pron] | 58 |
|
| 3 | [pron] is for [pron] [verb] | 53 |
|
| 4 | is difficult for [pron] [verb] | 43 |
|
