| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] impossible [to-vb] | 36 |
|
| 2 | it [vb -s] impossible [to-vb] | 27 |
|
| 3 | it seem impossible [to-vb] | 25 |
|
| 4 | it prove impossible [to-vb] | 21 |
|
| 5 | it proved impossible [to-vb] | 18 |
|
| 6 | it become impossible [to-vb] | 15 |
|
| 7 | it seems impossible [to-vb] | 12 |
|
| 8 | it seemed impossible [to-vb] | 12 |
|
| 9 | it becomes impossible [to-vb] | 9 |
|
| 10 | it became impossible [to-vb] | 6 |
|
| 11 | it [verb] impossible to get | 6 |
|
