| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when did [pers pn] [verb] and | 7 |
|
| 2 | when do [pers pn] [vb infin] and | 7 |
|
| 3 | when do [pers pn] [verb] and | 7 |
|
| 4 | when do [pers pn] [verb] and | 7 |
|
