| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] what happened to | 16 |
|
| 2 | [adv] [to-vb] what [vb past] to | 7 |
|
| 3 | [adv] [vb past] what [vb past] to | 7 |
|
| 4 | [adv] know what [vb past] to | 6 |
|
| 5 | [adv] [vb base] what [vb past] to | 5 |
|
| 6 | [adv] wonder what [vb past] to | 5 |
|
| 7 | [adv] [vb infin] what [vb past] to | 5 |
|
