| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not have been possible [prep] | 31 |
|
| 2 | [vb mod] not have [been] possible [prep] | 31 |
|
| 3 | [modal v] not have [been] possible [prep] | 30 |
|
| 4 | would not have [been] possible [prep] | 29 |
|
| 5 | would not have [been] possible [prep] | 29 |
|
| 6 | [modal v] not have [been] possible without | 18 |
|
| 7 | [modal v] not have [been] possible for | 7 |
|
