| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was [adj] | 23603 |
|
| 2 | it [be] impossible | 1565 |
|
| 3 | it be impossible | 1565 |
|
| 4 | [pron] was impossible | 579 |
|
| 5 | it [was/were] impossible | 562 |
|
