| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it difficult for [adj] [noun pl] | 16 |
|
| 2 | [pers pn] difficult for [adj] [noun pl] | 16 |
|
| 3 | it difficult for [adj] [noun pl] | 16 |
|
| 4 | [pron] difficult for [adj] [noun pl] | 11 |
|
