| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [v-ing] on [prep] | 23 |
|
| 2 | it have been going on [prep] | 19 |
|
| 3 | it have been [v-ing] on for | 19 |
|
| 4 | it 's been [v-ing] on [prep] | 15 |
|
| 5 | it has been [v-ing] on [prep] | 5 |
|
