| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [be] working on it for | 6 |
|
| 2 | have [been] working on it for | 6 |
|
| 3 | have been working on it for | 6 |
|
| 4 | have [be] working on it for | 6 |
|
| 5 | have be working on it for | 6 |
|
