| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when did [pron] [vb infin] [verb] | 89 |
|
| 2 | [adv] did [pron] [vb infin] [vb base] | 68 |
|
| 3 | when did [pron] [verb] [vb base] | 63 |
|
| 4 | when [verb] [pron] [vb infin] [vb base] | 61 |
|
| 5 | when [vb past] [pron] [vb infin] [vb base] | 61 |
|
| 6 | when do [pron] [vb infin] [vb base] | 61 |
|
