| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] [vb past] [pron] | 840 |
|
| 2 | [vb infin] [pron] [vb past] [pron] | 731 |
|
| 3 | [vb infin] when [pron] [vb past] | 141 |
|
