| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [verb] what is going on | 15 |
|
| 2 | and [verb] what is [v-ing] on | 11 |
|
| 3 | [coord] [vb infin] what is [v-ing] on | 6 |
|
| 4 | [coord] [vb base] what is [v-ing] on | 5 |
|
