| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be not always possible [to-vb] | 47 |
|
| 2 | is not always possible [to-vb] | 35 |
|
| 3 | was not always possible [to-vb] | 7 |
|
| 4 | 's not always possible [to-vb] | 5 |
|
