| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] on for | 130 |
|
| 2 | been [v-ing] on for | 118 |
|
| 3 | been go on for | 96 |
|
| 4 | been going on for | 95 |
|
| 5 | been [vb pp] on for | 12 |
|
| 6 | been work on for | 10 |
|
| 7 | been working on for | 10 |
|
