| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] did [pron] [vb infin] | 4519 |
|
| 2 | when [verb] [pron] [vb infin] | 622 |
|
| 3 | when do [pron] [vb infin] | 618 |
|
| 4 | when did [pron] [verb] | 382 |
|
| 5 | when [vb past] [pron] [vb infin] | 378 |
|
