| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb -s] be [verb] [conj] | 1590 |
|
| 2 | once it [vb -s] be [verb] | 82 |
|
| 3 | once it be [verb] [conj] | 44 |
|
| 4 | once it [vb -s] [verb] [conj] | 7 |
|
