| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [not/n't] [verb] [prep] certain | 13 |
|
| 2 | [vb base] [not/n't] [verb] [prep] certain | 13 |
|
| 3 | [vb base] [not/n't] [verb] for certain | 10 |
|
| 4 | [vb base] [not/n't] [verb] for certain | 10 |
|
