| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [adv] been [v-ing] on for | 7 |
|
| 2 | have [adv] been [verb] on for | 7 |
|
| 3 | have [adv] been go on for | 5 |
|
| 4 | have [adv] been going on for | 5 |
|
