| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what [modal v] [verb] | 645 |
|
| 2 | [vb past] [verb] what [verb] | 123 |
|
| 3 | [vb past] what [modal v] [verb] | 94 |
|
| 4 | [vb past] [verb] [modal v] [verb] | 75 |
|
| 5 | [vb past] [verb] what [modal v] | 46 |
|
