| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] on for some time | 12 |
|
| 2 | been [verb] on for some time | 12 |
|
| 3 | be go on for some time | 9 |
|
| 4 | be going on for some time | 9 |
|
