| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [verb] been [verb] [prep] | 363 |
|
| 2 | what [verb] been [v-ing] [prep] | 67 |
|
| 3 | [pron] [verb] been happening [prep] | 58 |
|
| 4 | what [verb] [be] happening [prep] | 55 |
|
| 5 | [Wh det] [verb] been happening [prep] | 55 |
|
| 6 | what [verb] been happen [prep] | 55 |
|
| 7 | what [verb] be happening [prep] | 55 |
|
| 8 | what [verb] been happening [prep] | 55 |
|
| 9 | what [verb] [been] happening [prep] | 55 |
|
