| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | understand [Wh det] be going on | 25 |
|
| 2 | understand [Wh det] [be] going on | 25 |
|
| 3 | understand what [be] going on | 25 |
|
| 4 | understand [Wh det] [is] going on | 19 |
|
| 5 | understand [Wh det] 's going on | 11 |
|
| 6 | understand [Wh det] is going on | 8 |
|
| 7 | understand [Wh det] [was/were] going on | 6 |
|
| 8 | understand [Wh det] was going on | 6 |
|
