| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] several years | 19 |
|
| 2 | [verb] been [verb] [prep] several years | 19 |
|
| 3 | [vb past] been [verb] [prep] several years | 9 |
|
| 4 | had been [verb] [prep] several years | 8 |
|
| 5 | [vb base] been [verb] [prep] several years | 7 |
|
| 6 | have been [verb] [prep] several years | 5 |
|
