| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] to [be] possible [verb] | 14 |
|
| 2 | [vb mod] [prep] be possible [verb] | 14 |
|
| 3 | [vb mod] [prep] [be] possible [to-vb] | 14 |
|
| 4 | ought [prep] [be] possible [verb] | 11 |
|
