| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been known [prep] many years | 10 |
|
| 2 | [verb] been known [prep] many years | 10 |
|
| 3 | has been known [prep] many years | 5 |
|
| 4 | [vb -s] been known [prep] many years | 5 |
|
