| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [Wh det] happened to the | 11 |
|
| 2 | [vb infin] [pron] happened to the | 11 |
|
| 3 | [vb infin] what happened to the | 10 |
|
| 4 | [vb infin] what happened to the | 10 |
|
