| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not have been possible [prep] | 30 |
|
| 2 | [modal v] not have been possible [prep] | 30 |
|
| 3 | would not have been possible [prep] | 28 |
|
| 4 | would not have been possible [prep] | 28 |
|
| 5 | not have been possible [prep] [art] | 15 |
|
| 6 | not have been possible [prep] [art] | 15 |
|
| 7 | not have been possible [prep] the | 14 |
|
| 8 | not have been possible [prep] the | 14 |
|
| 9 | not have been possible [prep] [adj] | 8 |
|
