| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] for some | 39 |
|
| 2 | had been [vb pp] for some | 31 |
|
| 3 | have been known for some | 20 |
|
| 4 | have been [vb pp] for some | 17 |
|
| 5 | have been [vb pp] for some | 6 |
|
| 6 | have been recognised for some | 6 |
|
