| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it [verb] | 4322 |
|
| 2 | [vb past] [verb] when | 624 |
|
| 3 | it [verb] when | 279 |
|
| 4 | [vb past] it when | 191 |
|
