| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who did not know | 92 |
|
| 2 | who did [not/n't] know | 92 |
|
| 3 | who did [adv] know | 92 |
|
| 4 | who did not know | 50 |
|
| 5 | who did n't know | 42 |
|
