| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was [adj] | 23603 |
|
| 2 | it was [adj] | 17332 |
|
| 3 | it be impossible | 1565 |
|
| 4 | it [be] impossible | 1565 |
|
| 5 | [pron] was impossible | 579 |
|
| 6 | it [was/were] impossible | 562 |
|
| 7 | it was impossible | 561 |
|
