| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [verb] | 5962 |
|
| 2 | difficult it is [verb] | 69 |
|
| 3 | difficult [conj] it [verb] | 32 |
|
| 4 | difficult [conj] it is | 24 |
|
