| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is it [adj] | 2201 |
|
| 2 | is [pron] impossible | 8 |
|
| 3 | [be] it impossible | 7 |
|
| 4 | be it impossible | 7 |
|
| 5 | [is] it impossible | 6 |
|
