| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be what happened [prep] | 69 |
|
| 2 | be what [verb] to | 65 |
|
| 3 | be what [vb past] to | 47 |
|
| 4 | be what happen to | 42 |
|
| 5 | [be] what happened to | 33 |
|
| 6 | be [pron] happened to | 33 |
|
