| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | really know what be [v-ing] on | 10 |
|
| 2 | really know what [be] going on | 10 |
|
| 3 | really know what [is] [v-ing] on | 6 |
|
| 4 | really know what 's [v-ing] on | 5 |
|
| 5 | really know what [be] [v-ing] on | 5 |
|
