| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [pron] happened to the | 5 |
|
| 2 | be [Wh det] happened to the | 5 |
|
| 3 | be what happened to the | 5 |
|
| 4 | be what happened to the | 5 |
|
| 5 | be [pron] happened to the | 5 |
|
