| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [verb] | 5193 |
|
| 2 | [vb pp] it [verb] | 1195 |
|
| 3 | [vb pp] when [verb] | 650 |
|
| 4 | [vb pp] when it | 276 |
|
