| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] for many | 17 |
|
| 2 | had been [v-ing] for many | 8 |
|
| 3 | [vb past] been [v-ing] for many | 8 |
|
| 4 | has been [v-ing] for many | 5 |
|
| 5 | [vb -s] been [v-ing] for many | 5 |
|
