| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i wonder [pron] happened to | 15 |
|
| 2 | i wonder what happened to | 15 |
|
| 3 | i wonder what happened to | 15 |
|
| 4 | i wonder [Wh det] happened to | 15 |
|
| 5 | i wonder [pron] happened to | 14 |
|
