| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for many years | 50 |
|
| 2 | has been [vb pp] for many [noun pl] | 27 |
|
| 3 | have been [vb pp] for many [noun pl] | 16 |
|
| 4 | had been [vb pp] for many [noun pl] | 14 |
|
| 5 | have been used for many [noun pl] | 13 |
|
| 6 | have been known for many [noun pl] | 10 |
|
