| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what [vb past] to | 51 |
|
| 2 | [adv] what happened to | 42 |
|
| 3 | so what [vb past] to | 18 |
|
| 4 | exactly what [vb past] to | 12 |
|
