| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [verb] [adj] | 723 |
|
| 2 | it is impossible [verb] | 596 |
|
| 3 | is impossible [verb] [adj] | 87 |
|
| 4 | it impossible [verb] [adj] | 45 |
|
