| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to find out what be going on | 29 |
|
| 2 | to find out what 's [v-ing] on | 15 |
|
| 3 | to find out what is [v-ing] on | 7 |
|
| 4 | to find out what was [v-ing] on | 7 |
|
