| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once it [vb -s] be [vb pp] [conj] | 12 |
|
| 2 | once it [vb -s] been [verb] [conj] | 12 |
|
| 3 | once it has be [verb] [conj] | 10 |
|
| 4 | once it [vb -s] be [verb] [that] | 9 |
|
| 5 | once it [vb -s] be [verb] that | 9 |
|
| 6 | once it [vb -s] be [verb] that | 9 |
|
