| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [conj] | 10609 |
|
| 2 | it difficult [verb] | 1120 |
|
| 3 | difficult [verb] [conj] | 1093 |
|
| 4 | it difficult [conj] | 33 |
|
