| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] impossible for them [to-vb] | 10 |
|
| 2 | it [be] impossible for them [verb] | 10 |
|
| 3 | it [be] impossible for them [verb] | 10 |
|
| 4 | it be impossible for them [verb] | 10 |
|
| 5 | it [is] impossible for them [verb] | 7 |
|
| 6 | it is impossible for them [verb] | 5 |
|
