| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [indef pn] know for certain | 11 |
|
| 2 | one [verb] for certain | 7 |
|
| 3 | [indef pn] knew for certain | 6 |
|
| 4 | [indef pn] [vb past] for certain | 6 |
|
| 5 | [indef pn] [vb -s] for certain | 5 |
|
| 6 | [indef pn] knows for certain | 5 |
|
