| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for many years | 50 |
|
| 2 | has been [vb pp] for many year | 24 |
|
| 3 | have been [vb pp] for many year | 12 |
|
| 4 | have been used for many year | 11 |
|
| 5 | had been [vb pp] for many year | 11 |
|
| 6 | have been known for many year | 10 |
|
