| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] was happening [be] | 16 |
|
| 2 | what was happening [be] | 16 |
|
| 3 | [pron] was happening [be] | 16 |
|
| 4 | what was happening [be] | 16 |
|
