| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [modal v] [verb] | 692 |
|
| 2 | [prep] what [modal v] [verb] | 692 |
|
| 3 | to [pron] [modal v] [verb] | 327 |
|
| 4 | to what [modal v] [verb] | 83 |
|
