| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] what have happened to | 12 |
|
| 2 | be what have happened to | 12 |
|
| 3 | [be] what have happened to | 12 |
|
| 4 | [is] what have happened to | 10 |
|
| 5 | 's what have happened to | 6 |
|
| 6 | [be] what 's happened to | 5 |
|
