| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] on for some | 18 |
|
| 2 | be [v-ing] on for some | 18 |
|
| 3 | been [v-ing] on for some | 18 |
|
| 4 | [be] going on for some | 14 |
|
