| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have not been [vb pp] [prep] years | 7 |
|
| 2 | have not been [vb pp] for years | 5 |
|
| 3 | have not been [vb pp] for years | 5 |
|
| 4 | had not been [vb pp] [prep] years | 5 |
|
