| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] on for some | 15 |
|
| 2 | have be going on for some | 13 |
|
| 3 | had be [v-ing] on for some | 7 |
|
| 4 | has be [v-ing] on for some | 5 |
|
