| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] on for [det] | 26 |
|
| 2 | [been] [v-ing] on for [det] | 26 |
|
| 3 | [been] going on for [det] | 19 |
|
| 4 | [been] [v-ing] on for some | 18 |
|
