| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [verb] at | 8429 |
|
| 2 | when [verb] [prep] | 4697 |
|
| 3 | when [verb] [prep] | 4697 |
|
| 4 | when [verb] at | 231 |
|
