| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who did not know [adv] | 9 |
|
| 2 | who [vb past] not know [adv] | 9 |
|
| 3 | who [vb past] not know [Wh adv] | 9 |
|
| 4 | who [vb past] not know how | 7 |
|
| 5 | who [vb past] not know how | 7 |
|
