| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been possible [verb] [prep] | 9 |
|
| 2 | it has been possible [verb] [prep] | 9 |
|
| 3 | it have been possible [to-vb] [prep] | 9 |
|
| 4 | it have been possible [verb] in | 5 |
|
| 5 | it have been possible [verb] in | 5 |
|
