| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what have been [verb] [prep] | 361 |
|
| 2 | what have been [v-ing] [prep] | 67 |
|
| 3 | [pron] have been happening [prep] | 58 |
|
| 4 | what have be happening [prep] | 55 |
|
| 5 | what have [be] happening [prep] | 55 |
|
| 6 | what have been happen [prep] | 55 |
|
| 7 | what [verb] been happening [prep] | 55 |
|
| 8 | what have been happening [prep] | 55 |
|
| 9 | what have [been] happening [prep] | 55 |
|
