| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] for several | 24 |
|
| 2 | [vb past] been [v-ing] for several | 11 |
|
| 3 | had been [v-ing] for several | 10 |
|
| 4 | [vb base] been [v-ing] for several | 7 |
|
| 5 | [vb -s] been [v-ing] for several | 6 |
|
| 6 | has been [v-ing] for several | 6 |
|
| 7 | [verb] been running for several | 5 |
|
