| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] [pron] [modal v] [verb] | 474 |
|
| 2 | [verb] [verb] what [modal v] [verb] | 84 |
|
| 3 | [vb past] [verb] [Wh det] [modal v] [verb] | 25 |
|
| 4 | [vb past] [verb] what [modal v] [verb] | 23 |
|
