| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] know since | 7 |
|
| 2 | [vb -s] [been] know since | 7 |
|
| 3 | [vb -s] [been] known since | 7 |
|
| 4 | [vb -s] been know since | 7 |
|
