| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be working on this | 27 |
|
| 2 | [be] working on this | 27 |
|
| 3 | [been] working on this | 12 |
|
| 4 | been working on this | 12 |
|
| 5 | [am/are] working on this | 7 |
|
| 6 | are working on this | 6 |
|
