| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] [is] impossible to be | 7 |
|
| 2 | [pron] [is] [adv] impossible to be | 5 |
|
| 3 | [pron] [is] [adv] impossible to be | 5 |
|
| 4 | [pron] [is] impossible to be [adj] | 24 |
|
| 5 | [pron] [is] impossible to be [adj] | 23 |
|
| 6 | [pron] [is] impossible to be certain | 7 |
|
| 7 | [pron] [is] impossible to be sure | 7 |
|
| 8 | [pron] [is] impossible to be sure | 7 |
|
| 9 | [pron] [is] impossible to be certain | 7 |
|
