| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb past] [prep] | 142109 |
|
| 2 | when [pron] [vb past] | 33418 |
|
| 3 | when [pron] [prep] | 122 |
|
| 4 | when [vb past] [prep] | 5 |
|
