| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [be] possible [to-vb] | 159 |
|
| 2 | not always possible [to-vb] | 49 |
|
| 3 | not always [be] possible | 25 |
|
| 4 | always [be] possible [to-vb] | 14 |
|
