| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [v-ing] on this [noun sg] | 11 |
|
| 2 | have been [v-ing] on this [noun] | 11 |
|
| 3 | [verb] been working on this [noun] | 7 |
|
| 4 | [vb base] been [v-ing] on this [noun] | 6 |
|
