| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult for [pers pn] [verb] | 106 |
|
| 2 | it be difficult for [pers pn] | 88 |
|
| 3 | it be for [pers pn] [verb] | 79 |
|
| 4 | it difficult for [pers pn] [verb] | 64 |
|
