| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be for [pron] | 411 |
|
| 2 | it be difficult for | 228 |
|
| 3 | be difficult for [pron] | 190 |
|
| 4 | it difficult for [pron] | 79 |
|
| 5 | it be difficult [pron] | 6 |
|
