| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] do [adv] know for certain | 11 |
|
| 2 | [pron] do [adv] know for certain | 11 |
|
| 3 | we do [adv] know for certain | 7 |
|
| 4 | we do [adv] know for certain | 7 |
|
