| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] for some years | 9 |
|
| 2 | [verb] been [v-ing] for some years | 9 |
|
| 3 | [vb past] been [v-ing] for some years | 7 |
|
| 4 | had been [v-ing] for some years | 7 |
|
