| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] known how | 44 |
|
| 2 | have known how | 44 |
|
| 3 | [vb past] known how | 21 |
|
| 4 | [vb infin] known how | 21 |
|
| 5 | have known how | 20 |
|
| 6 | had known how | 14 |
|
| 7 | 'd known how | 7 |
|
