| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] on at the [noun sg] | 50 |
|
| 2 | be [v-ing] on at the [noun] | 42 |
|
| 3 | be going on at the [noun] | 30 |
|
| 4 | be go on at the [noun] | 30 |
|
| 5 | be [verb] on at the moment | 18 |
|
| 6 | be [verb] on at the moment | 17 |
|
| 7 | be [vb pp] on at the [noun] | 14 |
|
| 8 | 's [verb] on at the [noun] | 13 |
|
| 9 | is [verb] on at the [noun] | 9 |
|
| 10 | be working on at the [noun] | 9 |
|
| 11 | be work on at the [noun] | 9 |
|
| 12 | 're [verb] on at the [noun] | 8 |
|
| 13 | was [verb] on at the [noun] | 8 |
|
| 14 | be [verb] on at the time | 8 |
|
| 15 | be [verb] on at the time | 8 |
|
| 16 | been [verb] on at the [noun] | 6 |
|
| 17 | be [verb] on at the [noun] | 5 |
|
