| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] for certain | 235 |
|
| 2 | known for [adj] | 150 |
|
| 3 | know for certain | 110 |
|
| 4 | known for [adj] | 55 |
|
| 5 | [vb pp] for certain | 54 |
|
| 6 | known [prep] certain | 22 |
|
| 7 | known [prep] certain | 22 |
|
| 8 | known for certain | 20 |
|
| 9 | known for certain | 20 |
|
