| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [adv] [verb] to | 78 |
|
| 2 | [pron] [adv] happened to | 71 |
|
| 3 | what [adv] happened [prep] | 40 |
|
| 4 | what [adv] [vb past] to | 39 |
|
| 5 | what [adv] happen to | 25 |
|
| 6 | what [adv] happened to | 18 |
|
