| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [vb pp] possible | 10 |
|
| 2 | it [be] [vb pp] possible | 10 |
|
| 3 | it [was/were] [vb pp] possible | 8 |
|
| 4 | it was [vb pp] possible | 7 |
|
