| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [verb] happened to | 499 |
|
| 2 | [verb] [adv] happened to | 68 |
|
| 3 | what [verb] [adv] happened | 65 |
|
| 4 | what [verb] [adv] to | 33 |
|
