| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been working on | 47 |
|
| 2 | have [been] working on | 47 |
|
| 3 | had [been] working on | 16 |
|
| 4 | 've [been] working on | 13 |
|
| 5 | have [been] working on | 7 |
|
| 6 | has [been] working on | 6 |
|
