| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be difficult [verb] | 2198 |
|
| 2 | it be [verb] [coord] | 877 |
|
| 3 | be difficult [verb] [coord] | 156 |
|
| 4 | it be difficult [coord] | 25 |
|
| 5 | it difficult [verb] [coord] | 21 |
|
