| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [verb] | 5193 |
|
| 2 | [vb past] it [verb] | 4322 |
|
| 3 | [vb past] when [verb] | 150 |
|
| 4 | [vb past] when it | 123 |
|
