| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [v-ing] on for | 109 |
|
| 2 | have been [v-ing] on for | 109 |
|
| 3 | [verb] been going on for | 90 |
|
| 4 | [vb -s] been [v-ing] on for | 58 |
|
| 5 | has been [v-ing] on for | 41 |
|
| 6 | [vb past] been [v-ing] on for | 28 |
|
| 7 | had been [v-ing] on for | 27 |
|
| 8 | [vb base] been [v-ing] on for | 19 |
|
| 9 | 's been [v-ing] on for | 17 |
|
| 10 | have been [v-ing] on for | 12 |
|
| 11 | [verb] been working on for | 10 |
|
| 12 | 've been [v-ing] on for | 7 |
|
