| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be not possible [to-vb] | 537 |
|
| 2 | be not always possible | 99 |
|
| 3 | not always possible [to-vb] | 49 |
|
| 4 | be always possible [to-vb] | 29 |
|
