| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] for them | 87 |
|
| 2 | it is impossible for [pron] | 38 |
|
| 3 | it is impossible for [pers pn] | 31 |
|
| 4 | it [be] impossible for them | 12 |
|
| 5 | it be impossible for them | 12 |
|
| 6 | it [is] impossible for them | 8 |
|
| 7 | [pron] is impossible for them | 6 |
|
| 8 | it is impossible [prep] them | 6 |
|
| 9 | it is impossible for they | 6 |
|
