| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] for several | 50 |
|
| 2 | been [v-ing] for several | 26 |
|
| 3 | been [vb pp] for several | 24 |
|
| 4 | been run for several | 6 |
|
| 5 | been running for several | 5 |
|
