| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] not possible [to-vb] | 417 |
|
| 2 | [is] not always possible | 83 |
|
| 3 | not always possible [to-vb] | 49 |
|
| 4 | [is] always possible [to-vb] | 25 |
|
