| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [Wh det] happened to | 44 |
|
| 2 | [adv] what happened to | 42 |
|
| 3 | [adv] what happened to | 42 |
|
| 4 | so [pron] happened to | 18 |
|
| 5 | exactly [pron] happened to | 11 |
|
| 6 | [adv] [pers pn] happened to | 7 |
|
