| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it difficult [verb] [coord] [verb] | 13 |
|
| 2 | it difficult [to-vb] [coord] [verb] | 13 |
|
| 3 | it difficult [verb] [coord] [vb infin] | 13 |
|
| 4 | it difficult [verb] and [verb] | 7 |
|
| 5 | it difficult [verb] or [verb] | 6 |
|
