| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [conj] [det] | 580 |
|
| 2 | it difficult [verb] [conj] | 79 |
|
| 3 | difficult [verb] [conj] [det] | 74 |
|
| 4 | it difficult [verb] [det] | 54 |
|
