| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been working on a [adj] [noun] | 7 |
|
| 2 | been working on a [adj] [noun sg] | 5 |
|
| 3 | [verb] been working on a [adj] | 8 |
|
| 4 | have been working on a [adj] | 8 |
|
