| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] | 38935 |
|
| 2 | it is [adj] | 34164 |
|
| 3 | it be impossible | 1565 |
|
| 4 | it [be] impossible | 1565 |
|
| 5 | it [is] impossible | 993 |
|
| 6 | [pron] is impossible | 843 |
|
| 7 | it is impossible | 812 |
|
