| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what happen [prep] | 138 |
|
| 2 | [adv] what [verb] to | 97 |
|
| 3 | [adv] what happen to | 89 |
|
| 4 | [adv] [pron] happen to | 85 |
|
