| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is impossible know [conj] | 5 |
|
| 2 | it is impossible know [conj] | 5 |
|
| 3 | [pers pn] is impossible know [subord] | 5 |
|
| 4 | [pers pn] is impossible to know [conj] | 5 |
|
