| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for some [noun pl] | 22 |
|
| 2 | have been [vb pp] for some years | 15 |
|
| 3 | has been [vb pp] for some [noun pl] | 9 |
|
| 4 | had been [vb pp] for some [noun pl] | 6 |
|
