| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] know for sure | 42 |
|
| 2 | [not/n't] know for sure | 38 |
|
| 3 | not know for sure | 38 |
|
| 4 | n't know for sure | 29 |
|
| 5 | [adv] know for sure | 11 |
|
| 6 | not know for sure | 9 |
|
