| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [v-ing] for many [noun pl] | 8 |
|
| 2 | had been [v-ing] for many [noun pl] | 8 |
|
| 3 | [vb past] been [v-ing] for many years | 7 |
|
