| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult for | 228 |
|
| 2 | [verb] it difficult for | 212 |
|
| 3 | [verb] it be for | 139 |
|
| 4 | [verb] it be difficult | 87 |
|
| 5 | [verb] be difficult for | 26 |
|
