| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] on at the [noun sg] | 8 |
|
| 2 | is [v-ing] on at the [noun] | 7 |
|
| 3 | is go on at the [noun] | 6 |
|
| 4 | is going on at the [noun] | 6 |
|
