| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] known for [det] time | 6 |
|
| 2 | [vb past] known for some time | 6 |
|
| 3 | [vb past] known for some time | 6 |
|
| 4 | had known for [adj] time | 6 |
|
