| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [vb infin] been possible [prep] | 30 |
|
| 2 | not have been possible [prep] | 30 |
|
| 3 | not have been possible [prep] | 30 |
|
| 4 | not [verb] been possible [prep] | 30 |
|
| 5 | not [verb] been possible without | 17 |
|
| 6 | not [verb] been possible without | 17 |
|
| 7 | not [verb] been possible for | 7 |
|
| 8 | not [verb] been possible for | 7 |
|
