| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [verb] been happen [prep] | 55 |
|
| 2 | what [verb] been happening [prep] | 55 |
|
| 3 | what have been happen [prep] | 55 |
|
| 4 | what [vb -s] been happen [prep] | 48 |
|
| 5 | what has been happen [prep] | 28 |
|
| 6 | what [verb] been happen in | 24 |
|
| 7 | what [verb] been happen in | 24 |
|
| 8 | what 's been happen [prep] | 20 |
|
| 9 | what [verb] been happen to | 14 |
|
| 10 | what [verb] been happen to | 14 |
|
| 11 | what [vb past] been happen [prep] | 7 |
|
| 12 | what had been happen [prep] | 7 |
|
