| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [vb past] | 2384 |
|
| 2 | what [vb past] to | 1302 |
|
| 3 | [prep] [vb past] to | 36 |
|
| 4 | [prep] what to | 19 |
|
