| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it would be impossible for [indef pn] | 5 |
|
| 2 | it [modal v] be impossible for [indef pn] | 5 |
|
| 3 | it [vb mod] be impossible for [indef pn] | 5 |
|
| 4 | it would be impossible for [indef pn] | 5 |
|
| 5 | it be impossible for [indef pn] [to-vb] | 5 |
|
| 6 | it be impossible for [indef pn] [verb] | 5 |
|
