| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been on it for | 5 |
|
| 2 | have been on it for | 5 |
|
| 3 | been [verb] on it for | 7 |
|
| 4 | been [v-ing] on it for | 6 |
|
| 5 | been work on it for | 6 |
|
| 6 | been working on it for | 6 |
|
