| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what happen to | 1120 |
|
| 2 | [Wh det] happened to | 866 |
|
| 3 | [Wh det] happens to | 407 |
|
| 4 | whatever happen to | 107 |
|
| 5 | which happen to | 64 |
|
| 6 | [Wh det] happen to | 19 |
|
