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