| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been known for some | 20 |
|
| 2 | [vb -s] been known for some | 12 |
|
| 3 | has been known for some | 11 |
|
| 4 | [vb base] been known for some | 5 |
|
| 5 | have been known for some | 5 |
|
