| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] happened to | 866 |
|
| 2 | happened to [be] | 441 |
|
| 3 | [Wh det] happened [be] | 136 |
|
| 4 | [Wh det] to [be] | 41 |
|
