| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] had be going on | 21 |
|
| 2 | [Wh det] [vb past] been going on | 21 |
|
| 3 | what [vb past] be going on | 12 |
|
| 4 | which [vb past] be going on | 9 |
|
