| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [v-ing] on | 38 |
|
| 2 | have been [v-ing] on | 38 |
|
| 3 | have [been] going on | 20 |
|
| 4 | have [been] working on | 7 |
|
