| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] know [conj] if [pron] | 6 |
|
| 2 | [not/n't] know [conj] if [pron] | 6 |
|
| 3 | not know [conj] if [pron] | 6 |
|
| 4 | [adv] know [conj] if [pers pn] | 5 |
|
