| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [verb] to | 2393 |
|
| 2 | [pron] happen to | 2077 |
|
| 3 | what happen [prep] | 2048 |
|
| 4 | [Wh det] happen to | 1292 |
|
| 5 | what happen to | 1120 |
|
