| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have been happening in | 24 |
|
| 2 | what have been happen in | 24 |
|
| 3 | [Wh det] has been happen in | 12 |
|
| 4 | [Wh det] 's been happen in | 10 |
|
