| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it impossible for them [verb] | 15 |
|
| 2 | it [be] impossible for them | 12 |
|
| 3 | [be] impossible for them [verb] | 12 |
|
| 4 | it [be] for them [verb] | 11 |
|
