| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [verb] what happened to | 24 |
|
| 2 | i [vb base] what happened to | 19 |
|
| 3 | i wonder what happened to | 15 |
|
| 4 | i wonder what happened to | 14 |
|
| 5 | i [vb past] what happened to | 5 |
|
