| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be going on behind the [noun pl] | 5 |
|
| 2 | be [v-ing] on behind the [noun pl] | 5 |
|
| 3 | be [verb] on behind the scenes | 5 |
|
| 4 | be go on behind the [noun pl] | 5 |
|
