| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is impossible [verb] | 596 |
|
| 2 | it is [verb] [det] | 299 |
|
| 3 | is impossible [verb] [det] | 59 |
|
| 4 | it impossible [verb] [det] | 20 |
|
