| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what have been happening to | 6 |
|
| 2 | [prep] what have been happening to | 6 |
|
| 3 | what have been happening to [pron] | 7 |
|
| 4 | what have been happening to [pers pn] | 7 |
|
| 5 | what have been happening to [art] | 5 |
|
| 6 | what have been happening to [art] | 5 |
|
