| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know what be going on | 104 |
|
| 2 | know what 's [v-ing] on | 47 |
|
| 3 | know what was [v-ing] on | 46 |
|
| 4 | know what is [v-ing] on | 11 |
|
