| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [pron] happened to [noun] | 10 |
|
| 2 | be [Wh det] happened to [noun] | 10 |
|
| 3 | be what happened to [noun] | 10 |
|
| 4 | be what happened to [noun] | 10 |
|
| 5 | be [pron] happened to [noun prp] | 9 |
|
| 6 | 's [pron] happened to [noun] | 5 |
|
